Dr. Walter Gregory Shakespeare, DO

  • Sacramento, CA
  • Internist
NPI1861705444PAC ID5092959718
Medicare services, 2024
27
Medicare patients, 2024
26
Part D claims, 2024
1,063
Publications
2
Hospital affiliations
1
Practice address
2025 Morse Avenue, Sacramento, CA 95825
Practice phone
Call (916) 973-5000
Professional email
Get professional email
Personal email
Get personal email
Mobile number
Get mobile number
Social profiles

Primary practice

Sacramento Medical Center

Hospital · Sacramento, California

Find Dr. Shakespeare's professional email, personal email and mobile number

Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.

View contacts for free

Dr. Walter Gregory Shakespeare is an internist in Sacramento, California

Dr. Shakespeare practices at Sacramento Medical Center in Sacramento, California, part of Kaiser Permanente.

Dr. Shakespeare's NPI, 1861705444, was assigned on July 23, 2010. Dr. Shakespeare graduated from Chicago College of Osteopathic Medicine at Midwestern University in 2010. Dr. Shakespeare holds Pennsylvania license OT013798.

NPI and contact details
Medicare PAC ID
5092959718
NPI enumeration date
July 23, 2010
NPI status
Active
Accepts Medicare assignment
Yes
Practice phone
(916) 973-5000
Professional email
Get email
Personal email
Get email
Mobile number
Get number
Sex
Male
Estimated age
42
Medical school graduation
2010

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)

Dr. Walter Gregory Shakespeare practices at Sacramento Medical Center in Sacramento, California

Dr. Shakespeare's primary practice is Sacramento Medical Center, at 2025 Morse Avenue, Sacramento, CA 95825 in Sacramento County. The practice phone is (916) 973-5000.

Source: Dmand AI Affiliation Data

Dr. Walter Gregory Shakespeare is affiliated with 1 site of care and 1 medical group

Dr. Shakespeare's primary practice is Sacramento Medical Center in Sacramento, California, part of Kaiser Permanente. The medical group on file is The Permanente Medical Group, Inc.

Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Dr. Walter Gregory Shakespeare's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Shakespeare practices. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Sacramento Medical CenterAvailable with a free account

Source: Dmand AI Technology Install Data

For health IT teams

See the EHR and IT leaders at every hospital where Dr. Shakespeare practices

Dmand AI maps EHR vendors, IT decision makers and buying committees across Kaiser Permanente and 6.2K+ hospitals, with verified contacts in the same login.

Dr. Walter Gregory Shakespeare is one of 16,751 internists in California

Internal medicine is Dr. Shakespeare's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Shakespeare is board certified in critical care medicine by the American Board of Internal Medicine. Dr. Shakespeare is licensed in Pennsylvania.

Specialties and state licenses

  • Internal medicine, PennsylvaniaPrimaryLicense OT013798 · taxonomy 207R00000X

Internists near Dr. Shakespeare

Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks

Dr. Walter Gregory Shakespeare billed Medicare for 27 services in 2024

CMS data shows 27 Medicare services from Dr. Shakespeare across 1 procedure code in 2024, for 26 Medicare patients. Medicare paid $1,717 for them. Every service was in a facility, such as a hospital, rather than an office.

Medicare services, 202427
Medicare patients26
Paid by Medicare$1,717
Procedure codes1

Dr. Shakespeare's Medicare services by type, 2023 to 2024

  • 2023
  • 2024
Office and hospital visits
2023: 242024: 2713%

Dr. Shakespeare compared with the California median for internists, 2024

  • Dr. Shakespeare
  • California median
Medicare services
27vs 36193% below
Medicare patients
26vs 15183% below
Part D claims
982vs 4212.3 times

Medians across 15,815 internists in California with Dmand AI profiles that report each measure.

Dr. Shakespeare's most billed Medicare procedure codes, 2024

CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.

See all procedures by Dr. Shakespeare

Need commercial claims for Dr. Shakespeare?

Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Shakespeare and other internists in California.

Book a meeting

Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Dr. Walter Gregory Shakespeare treated 26 Medicare patients in 2024, average age 71

CMS counts 26 Medicare patients who saw Dr. Shakespeare in 2024. The largest group is 65 to 74, with 12 patients. 75% of them have high blood pressure, and 58% have chronic kidney disease. Their average risk score is 2.35, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Dr. Shakespeare's median patient age at 64, with 52% women.

Medicare patients, 202426
Average age71
Average risk score2.35

Dr. Shakespeare's Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Chronic conditions among Dr. Shakespeare's Medicare patients, 2024

  1. High blood pressure75%
  2. Chronic kidney disease58%
  3. High cholesterol58%
  4. Arthritis46%
  5. Heart failure46%
  6. Ischemic heart disease46%
  7. Atrial fibrillation42%
  8. COPD42%

Share of Medicare patients with each condition. A patient can have several.

Dr. Shakespeare's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 64

Patient panel by sex, all payers

  • Women52%
  • Men47%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Dr. Walter Gregory Shakespeare wrote 1,063 Medicare Part D claims in 2024

In 2024, Dr. Shakespeare wrote 1,063 Medicare Part D claims for 190 patients. 60% of them were for generic drugs. CMS names the drug for 982 of them, across 19 drugs with 11 or more claims each, at $214,257 in total drug cost. In 2023, CMS named 1,208 claims across 21 drugs.

Part D claims, 20241,063
Drugs named by CMS19
Total drug cost$214,257
Part D patients190

Dr. Shakespeare's Part D claims by kind of drug, 2024

  • Generic643 claims60%
  • Brand-name420 claims40%

Dr. Shakespeare's most prescribed drugs by claims, 2024

CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.

Drug classes CMS tracks in Dr. Shakespeare's Part D claims, 2024

  • Antibiotics8%89 of 1,063 claims

Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.

Part D claims for drugs CMS names, 2023 to 2024

  • 2023
  • 2024
Claims for drugs CMS names
2023: 1,2082024: 98219%

Drugs named by CMS: 19 in 2024, 21 in 2023.

See all prescribing by Dr. Shakespeare

Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data

How Dr. Walter Gregory Shakespeare takes part in Medicare

Dr. Shakespeare accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Accepts Medicare assignment
Yes

Source: Doctors and Clinicians National Downloadable File (CMS)

For MedTech and pharma teams

Find internists like Dr. Shakespeare by procedure volume and prescribing

Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.

Dr. Walter Gregory Shakespeare has 2 publications on record

Dmand AI links 2 papers to Dr. Shakespeare, published from 2013 to 2015. The most frequent topics are Critical Care. Dr. Shakespeare's most frequent co-authors are Niusha Damaghi, MD and Larry Ladi, MD.

Papers2
Years published2013 to 2015

Topics Dr. Shakespeare writes about most

  • Critical Care

Dr. Shakespeare's most frequent co-authors

Recent publications by Dr. Shakespeare

See all 2 publications and co-authors

See who Dr. Shakespeare researches with

Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Shakespeare works with, so you can find a warm path to the right internists.

How network discovery works

Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage

Dr. Walter Gregory Shakespeare received $18 in industry payments in 2019

CMS Open Payments shows 1 general payment to Dr. Shakespeare from 1 drug or device company in 2019. Food and beverage make up the largest share, 100% of the total. Grifols Shared Services North America, Inc. paid the most, $18.

Companies that paid Dr. Shakespeare the most, 2019 to 2019

Share is of all general payments to this clinician.

See all payments to Dr. Shakespeare

Source: Open Payments (CMS), 2025 data, released July 7, 2026

Dr. Walter Gregory Shakespeare graduated from Chicago College of Osteopathic Medicine at Midwestern University

Dr. Shakespeare graduated from Chicago College of Osteopathic Medicine at Midwestern University in 2010. Dr. Shakespeare is a member of ACCP.

  1. Medical schoolChicago College of Osteopathic Medicine at Midwestern University
  2. Board certified in critical care medicineAmerican Board of Internal Medicine
  3. Board certified in internal medicineAmerican Board of Internal Medicine
  4. Board certified in pulmonary diseaseAmerican Board of Internal Medicine
  5. Board certified in 2017 - 2025CA State License
  6. Board certified in 2010 - 2014PA State License
  7. Board certified in 2016 - 2019TX State License

Source: Dmand AI Professional Profile Data

Dr. Walter Gregory Shakespeare accepts plans from 2 insurance carriers

Dr. Shakespeare is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.

  • Kaiser Permanente
  • CMS Medicare

Plan types Dr. Shakespeare accepts, by number of carriers

  1. EPO1
  2. HMO1
  3. Medicare1
  4. POS1

Source: Dmand AI Insurance Network Data

Sources for Dr. Walter Gregory Shakespeare's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneDmand AI Affiliation Data
Primary practice, affiliations and health systemDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab)
MIPS scores, telehealth, assignment and procedure percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)
Publications, topics and co-authorsPubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage
Industry paymentsOpen Payments (CMS) (opens in a new tab)
Training, board certification and membershipsDmand AI Professional Profile Data
Insurance carriers and plan typesDmand AI Insurance Network Data
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Dr. Walter Gregory Shakespeare

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Dr. Walter Gregory Shakespeare's NPI number?

Dr. Walter Gregory Shakespeare's NPI number is 1861705444. It was assigned on July 23, 2010, and it is active in the NPI Registry.

What kind of doctor is Dr. Walter Gregory Shakespeare?

Dr. Walter Gregory Shakespeare is an internist in Sacramento, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).

Where does Dr. Walter Gregory Shakespeare practice?

Dr. Shakespeare practices at 2025 Morse Avenue, Sacramento, CA 95825. Dr. Shakespeare's primary practice is Sacramento Medical Center in Sacramento, California, part of Kaiser Permanente.

What is Dr. Walter Gregory Shakespeare's office phone number?

The practice phone on file for Dr. Shakespeare is (916) 973-5000.

What is Dr. Walter Gregory Shakespeare's medical license number?

Dr. Shakespeare holds Pennsylvania license OT013798.

Which hospitals is Dr. Walter Gregory Shakespeare affiliated with?

Dr. Shakespeare practices at Sacramento Medical Center in Sacramento, California.

What medical group is Dr. Walter Gregory Shakespeare part of?

Dr. Shakespeare is linked to The Permanente Medical Group, Inc.

Does Dr. Walter Gregory Shakespeare accept Medicare?

Yes. CMS data shows Dr. Shakespeare billed Medicare for 27 services in 2024, and Dr. Shakespeare accepts Medicare assignment.

How many Medicare patients does Dr. Walter Gregory Shakespeare see?

CMS counts 26 Medicare patients who saw Dr. Shakespeare in 2024, with an average age of 71.

Is Dr. Walter Gregory Shakespeare board certified?

Yes. Dr. Shakespeare is board certified in critical care medicine by the American Board of Internal Medicine.

Show 8 more questionsShow fewer questions

What services does Dr. Walter Gregory Shakespeare bill to Medicare?

In 2024, Dr. Shakespeare's most billed Medicare services were hospital inpatient care (99232).

Where did Dr. Walter Gregory Shakespeare go to medical school?

Dr. Shakespeare graduated from Chicago College of Osteopathic Medicine at Midwestern University in 2010.

What drugs does Dr. Walter Gregory Shakespeare prescribe most?

In 2024 Medicare Part D data, Dr. Shakespeare's most prescribed drugs by claims were Prednisone, Albuterol Sulfate Hfa and Spiriva Respimat.

Has Dr. Walter Gregory Shakespeare received payments from drug or device companies?

CMS Open Payments shows $18 in general payments to Dr. Shakespeare from 1 company from 2019 to 2019. The largest total came from Grifols Shared Services North America, Inc.

How long has Dr. Walter Gregory Shakespeare been practicing?

Dr. Shakespeare graduated from medical school in 2010, 16 years ago.

Does Dr. Walter Gregory Shakespeare do research?

Dmand AI links 2 publications to Dr. Shakespeare, published from 2013 to 2015.

Who does Dr. Walter Gregory Shakespeare publish with?

Dr. Shakespeare's most frequent co-authors are Niusha Damaghi, MD (1 shared paper) and Larry Ladi, MD (1 shared paper).

What insurance does Dr. Walter Gregory Shakespeare accept?

Dr. Shakespeare is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.

Selling to internal medicine practices?

See internists in California by site of care and group

Find the practices, groups and hospitals they work with, and the right people to contact at each.

  • 30 days free
  • Self-serve
  • No credit card

Cookie settings

Turn each category on or off. Your choice is kept for 12 months and you can change it here at any time.

Necessary

Always on. Sign-in, security, downloads you asked for, your cookie choice, and the page that led to a signup.

View cookies (6)
  • dm_consentDmand AI. Your cookie choices and whether your browser sent a Global Privacy Control signal. 12 months.
  • dm_ft, dm_ltDmand AI. The first and the latest page you arrived on, with the date, so a signup is credited to the page that worked. 90 days, 30 days.
  • dm_fs, dm_lsDmand AI. The first and the latest source of a visit (a search engine, a campaign or the site that linked here). 90 days, 30 days.
  • dm_dl, dm_dl_okDmand AI. After you give an email address for a download, lets you download files without being asked again. 30 days.
  • Session and CSRF cookiesDmand AI (app.dmand.ai). Sign-in and form protection in the application. Session.
  • __cf_bm, cf_clearanceCloudflare. Tells people from automated traffic and keeps the site available. 30 minutes; cf_clearance while a security check is valid.

Analytics

On unless you turn it off. How pages are used, in aggregate, and recordings of how pages are used.

View cookies (6)
  • Google Tag ManagerGoogle. Loads the analytics and marketing tags that are on. Sets no cookie of its own and does not load when both categories are off. n/a.
  • _ga, _ga_<container-id>Google Analytics 4. Visits and page views in aggregate on dmand.ai. 2 years.
  • _clck, _clskMicrosoft Clarity. Recordings and heatmaps of how pages are used, with form fields masked. 1 year, 1 day.
  • CLID, MUID, ANONCHK, MR, SMMicrosoft (clarity.ms). Set by Microsoft when Clarity loads, to recognize a browser across sites that use Clarity. Up to 1 year.
  • None (cookieless)Ahrefs Analytics. Page views in aggregate. n/a.
  • ph_<project>_posthogPostHog. Product usage, errors and performance in app.dmand.ai, used to fix bugs and improve features. 365 days.

Marketing

On unless you turn it off, and always off when your browser sends a Global Privacy Control signal. A visitor identification service tells our sales team which companies and people visit.

View cookies (6)
  • _reb2buid, _reb2butkRB2B. Recognizes a returning browser for visitor identification. 360 days, 1 year.
  • _reb2bgeoRB2B. The location used to decide whether a visit can be identified. 20 days.
  • _reb2brefRB2B. The page or site that referred the visit. 15 days.
  • _reb2bfxf, _reb2btd, _reb2bliRB2B. Links the visit to an identified business profile. 1 month.
  • _reb2bresolveRB2B. Holds a match while it is being resolved. 2 days.
  • _reb2sessionID, _reb2bloadedRB2B. The current visit, and a guard against loading the script twice. 30 minutes, 1 second.

Functional

On unless you turn it off. Remembers choices such as a collapsed section.

View cookies (none today)