Dr. Deborah A. Greer, MD

  • Walnut Creek, CA
  • Family medicine physician
NPI1003851858PAC ID1759334766
Medicare services, 2024
65
Medicare patients, 2024
85
Part D claims, 2024
64
Publications
8
MIPS score, 2024
100
Practice address
1450 Treat Blvd, Walnut Creek, CA 94597
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

John Muir Medical Center - Walnut C - Imaging - HOPD

Acute Care Hospital outpatient department · Walnut Creek, California

See all 3 affiliations

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Dr. Deborah A. Greer is a family medicine physician in Walnut Creek, California

Dr. Greer practices at John Muir Medical Center - Walnut C - Imaging - HOPD in Walnut Creek, California.

Dr. Greer's NPI, 1003851858, was assigned on June 17, 2006. Dr. Greer graduated from UC Davis School of Medicine in 1996. Dr. Greer's California license number on file is A64667.

NPI and contact details
Medicare PAC ID
1759334766
NPI enumeration date
June 17, 2006
NPI status
Active
Accepts Medicare assignment
Yes
Professional email
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Personal email
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Mobile number
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Sex
Female
Estimated age
56
Medical school graduation
1996

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

Dr. Deborah A. Greer practices at John Muir Medical Center - Walnut C - Imaging - HOPD in Walnut Creek, California

Dr. Greer's primary practice is John Muir Medical Center - Walnut C - Imaging - HOPD, at 1450 Treat Blvd, Walnut Creek, CA 94597.

  • John Muir Medical Center - Walnut C - Imaging - HOPD
    1450 Treat Blvd, Walnut Creek, CA 94597

Source: Dmand AI Affiliation Data

Dr. Deborah A. Greer is affiliated with 2 sites of care and 1 medical group

Dr. Greer's primary practice is John Muir Medical Center - Walnut C - Imaging - HOPD in Walnut Creek, California. The medical group on file is John Muir Medical Group. Dmand AI also links Dr. Greer to 1 more group practice or clinic, named with a free account. Dr. Greer's employer is on file too: a hospital.

John Muir Medical Center - Walnut C - Imaging - HOPDAcute Care Hospital outpatient department · Walnut Creek, CaliforniaPrimary
John Muir Medical GroupPrimary care group, Walnut Creek, CA1 group practice or clinicName with a free accountEmployer: hospitalName with a free account
See all 3 affiliations for Dr. Greer

Source: Dmand AI Affiliation Data

Dmand AI tracks the EHR system at Dr. Deborah A. Greer's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Greer practices, 2 sites in all. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
John Muir Medical Center - Walnut C - Imaging - HOPDAvailable with a free account
+1 more affiliated siteAvailable with a free account

Source: Dmand AI Technology Install Data

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Dr. Deborah A. Greer is one of 15,680 family medicine physicians in California

Family medicine is Dr. Greer's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Greer is board certified in family medicine by the American Board of Family Medicine. Dr. Greer has a license on file in California.

Specialties and state licenses

  • Family medicine, CaliforniaPrimaryLicense A64667 · 1998 to 2025 · taxonomy 207Q00000X

Clinical focus

Dmand AI lists acute sinusitis, chronic hypertension, chronic kidney disease, eyelid inflammation, joint pain, low blood pressure, lower back pain and pneumonia among the conditions Dr. Greer treats.

Family medicine physicians near Dr. Greer

Counts of family medicine physicians 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. Deborah A. Greer billed Medicare for 65 services in 2024

CMS data shows 65 Medicare services from Dr. Greer across 1 procedure code in 2024, all of them office visits, for 85 Medicare patients. Medicare paid $4,609 for them. Every service was in an office.

Medicare services, 202465
Medicare patients85
Paid by Medicare$4,609
Procedure codes1

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

  • 2023
  • 2024
Office and hospital visits
2023: 622024: 655%

Dr. Greer compared with the California median for family medicine physicians, 2024

  • Dr. Greer
  • California median
Medicare services
65vs 24674% below
Medicare patients
85vs 11828% below
Part D claims
27vs 83397% below

Medians across 15,349 family medicine physicians in California with Dmand AI profiles that report each measure.

Dr. Greer'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. Greer

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

Dr. Deborah A. Greer treated 85 Medicare patients in 2024, average age 71

CMS counts 85 Medicare patients who saw Dr. Greer in 2024. The largest group is 65 to 74, with 42 patients. 69% of them have high cholesterol, and 64% have high blood pressure. 44% are also on Medicaid. Their average risk score is 1.15, where 1.00 is the Medicare average.

Across all payers, Dmand AI patient panel data puts Dr. Greer's median patient age at 43, with 53% women.

Medicare patients, 202485
Average age71
Average risk score1.15
Also on Medicaid44%

Dr. Greer's Medicare patients by age, 2024

Dr. Greer's Medicare patients by sex, 2024

  • Women5666%
  • Men2934%

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

  1. High cholesterol69%
  2. High blood pressure64%
  3. Arthritis49%
  4. Diabetes27%
  5. Anxiety24%
  6. Mood disorders22%
  7. Depression21%
  8. Chronic kidney disease20%

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

Dr. Greer's patients across all payers

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

Patient panel by age, all payers

Median age 43

Patient panel by sex, all payers

  • Women53%
  • Men45%

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

Dr. Deborah A. Greer wrote 64 Medicare Part D claims in 2024

In 2024, Dr. Greer wrote 64 Medicare Part D claims for 30 patients. 86% of them were for generic drugs. CMS names the drug for 27 of them, across 2 drugs with 11 or more claims each, at $312 in total drug cost. In 2019, CMS named 35 claims across 2 drugs.

Part D claims, 202464
Drugs named by CMS2
Total drug cost$312
Part D patients30

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

  • Generic55 claims86%
  • Brand-name and other9 claims14%

Dr. Greer's most prescribed drugs by claims, 2021

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

Part D claims for drugs CMS names, 2019 to 2021

  • 2019
  • 2021
Claims for drugs CMS names
2019: 352021: 2723%

Drugs named by CMS: 2 in 2021, 2 in 2019.

See all prescribing by Dr. Greer

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

Dr. Deborah A. Greer scored 100 out of 100 in Medicare's MIPS program for 2024

CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Dr. Greer for performance year 2024, reported through an alternative payment model (APM). Dr. Greer accepts Medicare assignment, so Medicare's approved amount is taken as full payment.

Accepts Medicare assignment
Yes

Dr. Greer's MIPS scores, performance year 2024

  • 100of 100Final score
  • 86.3of 100Quality
  • 100of 100Promoting Interoperability
  • 40of 100Improvement Activities

Each score is out of 100. The final score weighs the categories CMS scored for this clinician.

Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026

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Dr. Deborah A. Greer has 8 publications on record

Dmand AI links 8 papers to Dr. Greer, published from 2005 to 2007. 2005 was the busiest year, with 2. The most frequent topics are Green Fluorescent Proteins, Mice, Inbred C57BL and Bone Marrow Cells. Dr. Greer has published most often in Exp Hematol. Dr. Greer's most frequent co-author is Sahana Ramanujam, MD.

Papers8
Years published2005 to 2007

Topics Dr. Greer writes about most

  • Green Fluorescent Proteins
  • Mice, Inbred C57BL
  • Bone Marrow Cells
  • Bone Marrow Transplantation
  • Muscle Fibers, Skeletal
  • Muscle, Skeletal
  • Regeneration
  • Cell Differentiation

Dr. Greer's most frequent co-authors

Recent publications by Dr. Greer

See all 8 publications and co-authors

See who Dr. Greer researches with

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

How network discovery works

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

Dr. Deborah A. Greer received $280 in industry payments from 2016 to 2017

CMS Open Payments shows 7 general payments to Dr. Greer from 3 drug and device companies from 2016 to 2017. Food and beverage make up the largest share, 100% of the total. Pfizer Inc. paid the most, $119.

General payments to Dr. Greer by program year, 2016 to 2017

Companies that paid Dr. Greer the most, 2016 to 2017

Share is of all general payments to this clinician.

See all payments to Dr. Greer

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

Dr. Deborah A. Greer graduated from UC Davis School of Medicine

Dr. Greer graduated from UC Davis School of Medicine in 1996.

  1. Medical schoolUC Davis School of Medicine
  2. Board certified in family medicineAmerican Board of Family Medicine

Source: Dmand AI Professional Profile Data

Dr. Deborah A. Greer accepts plans from 14 insurance carriers

Dr. Greer is in network with 14 carriers, including Elevance, Blue Cross Blue Shield of Michigan and Excellus BlueCross BlueShield. Medicare plans come from the most carriers, 9. Check the plan with the practice before a visit.

  • Elevance
  • Blue Cross Blue Shield of Michigan
  • Excellus BlueCross BlueShield
  • United Healthcare
  • HCSC
  • Aetna
  • Blue Cross Blue Shield of Massachusetts
  • Regence Health Plans
  • +6 more carriersWith a free account

Plan types Dr. Greer accepts, by number of carriers

  1. Medicare9
  2. PPO9
  3. HMO6
  4. EPO4
  5. POS4

Source: Dmand AI Insurance Network Data

Sources for Dr. Deborah A. Greer'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 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)Clinician Public Reporting: Overall MIPS Performance (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. Deborah A. Greer

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. Deborah A. Greer's NPI number?

Dr. Deborah A. Greer's NPI number is 1003851858. It was assigned on June 17, 2006, and it is active in the NPI Registry.

What kind of doctor is Dr. Deborah A. Greer?

Dr. Deborah A. Greer is a family medicine physician in Walnut Creek, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).

Where does Dr. Deborah A. Greer practice?

Dr. Greer practices at 1450 Treat Blvd, Walnut Creek, CA 94597. Dr. Greer's primary practice is John Muir Medical Center - Walnut C - Imaging - HOPD in Walnut Creek, California. Dmand AI also links Dr. Greer to 1 group practice or clinic.

What is Dr. Deborah A. Greer's medical license number?

Dr. Greer's California license number on file is A64667.

What medical group is Dr. Deborah A. Greer part of?

Dr. Greer is linked to John Muir Medical Group.

Does Dr. Deborah A. Greer accept Medicare?

Yes. CMS data shows Dr. Greer billed Medicare for 65 services in 2024, and Dr. Greer accepts Medicare assignment.

What is Dr. Deborah A. Greer's MIPS score?

Dr. Greer's MIPS final score for performance year 2024 is 100 out of 100, reported through an alternative payment model (APM).

How many Medicare patients does Dr. Deborah A. Greer see?

CMS counts 85 Medicare patients who saw Dr. Greer in 2024, with an average age of 71.

Is Dr. Deborah A. Greer board certified?

Yes. Dr. Greer is board certified in family medicine by the American Board of Family Medicine.

What services does Dr. Deborah A. Greer bill to Medicare?

In 2024, Dr. Greer's most billed Medicare services were office visit, established patient (99213).

Show 7 more questionsShow fewer questions

Where did Dr. Deborah A. Greer go to medical school?

Dr. Greer graduated from UC Davis School of Medicine in 1996.

What drugs does Dr. Deborah A. Greer prescribe most?

In 2021 Medicare Part D data, Dr. Greer's most prescribed drugs by claims were Lisinopril and Atorvastatin Calcium.

Has Dr. Deborah A. Greer received payments from drug or device companies?

CMS Open Payments shows $280 in general payments to Dr. Greer from 3 companies from 2016 to 2017. The largest total came from Pfizer Inc.

How long has Dr. Deborah A. Greer been practicing?

Dr. Greer graduated from medical school in 1996, 30 years ago.

Does Dr. Deborah A. Greer do research?

Dmand AI links 8 publications to Dr. Greer, published from 2005 to 2007.

Who does Dr. Deborah A. Greer publish with?

Dr. Greer's most frequent co-authors are Sahana Ramanujam, MD (1 shared paper).

What insurance does Dr. Deborah A. Greer accept?

Dr. Greer is in network with 14 carriers, including Elevance, Blue Cross Blue Shield of Michigan and Excellus BlueCross BlueShield. Medicare plans come from the most carriers, 9. Check the plan with the practice before a visit.

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