Dr. Gay McManus Walker, MD
- Medicare services, 2024
- 2,180
- Medicare patients, 2024
- 645
- Part D claims, 2024
- 5,648
- Hospital affiliations
- 3
- Industry payments
- $70
- Practice address
- 477 N El Camino Real Suite C-100, Encinitas, CA 92024
- Practice phone
- Call (760) 942-8800
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
UCSD Center for Surgery of Encinitas
Surgery Center - Medicare-Certified · Encinitas, California
Find Dr. Walker's professional email, personal email and mobile number
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Dr. Gay McManus Walker is an internist in Encinitas, California
Dr. Walker practices at UCSD Center for Surgery of Encinitas in Encinitas, California.
Dr. Walker's NPI, 1043587009, was assigned on November 18, 2011. Dr. Walker graduated from UC San Diego School of Medicine in 1987. Dr. Walker holds California license G63605.
- NPI
- 1043587009NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8022285493
- NPI enumeration date
- November 18, 2011
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (760) 942-8800
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gay McManus Walker practices at UCSD Center for Surgery of Encinitas in Encinitas, California
Dr. Walker's primary practice is UCSD Center for Surgery of Encinitas, at 477 N El Camino Real Suite C-100, Encinitas, CA 92024. The practice phone is (760) 942-8800.
- UCSD Center for Surgery of Encinitas477 N El Camino Real Suite C-100, Encinitas, CA 92024Phone(760) 942-8800
Source: Dmand AI Affiliation Data
Dr. Gay McManus Walker is affiliated with 9 sites of care and 1 medical group
Dr. Walker's primary practice is UCSD Center for Surgery of Encinitas in Encinitas, California. Dr. Walker is also affiliated with Scripps Memorial Hospital Encinitas. The medical group on file is Scripps Clinic Medical Group. Dmand AI also links Dr. Walker to 2 more hospitals, 2 home health agencies, 1 group practice or clinic, 1 skilled nursing facility and 1 ambulatory surgery center, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Gay McManus Walker's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Walker practices, 9 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UCSD Center for Surgery of Encinitas | Available with a free account |
| +8 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gay McManus Walker is one of 16,751 internists in California
Internal medicine is Dr. Walker's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Walker is board certified in internal medicine by the American Board of Internal Medicine. Dr. Walker is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists acute gallbladder or bile duct inflammation, acute mini-stroke (TIA), acute sinusitis, acute skin infection, adjustment disease, alzheimer's disease, aneurysm and anxiety among the conditions Dr. Walker treats.
Internists near Dr. Walker
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. Gay McManus Walker billed Medicare for 2,180 services in 2024
CMS data shows 2,180 Medicare services from Dr. Walker across 14 procedure codes in 2024, for 645 Medicare patients. Medicare paid $166,198 for them. Every service was in an office.
Dr. Walker's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 8502024: 1,03422%
- Other services
- 2023: 3562024: 1,014185%
- Tests and treatments
- 2023: 1582024: 13216%
- Surgery
- 2023: 152024: 0100%
Dr. Walker compared with the California median for internists, 2024
- Dr. Walker
- California median
- Medicare services
- 2,180vs 3616.0 times
- Medicare patients
- 645vs 1514.3 times
- Part D claims
- 4,931vs 42111.7 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Walker'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.
Need commercial claims for Dr. Walker?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Walker and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gay McManus Walker treated 645 Medicare patients in 2024, average age 77
CMS counts 645 Medicare patients who saw Dr. Walker in 2024. The largest group is 75 to 84, with 278 patients. 75% of them have high cholesterol, and 58% have high blood pressure. 3% are also on Medicaid. Their average risk score is 0.97, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Walker's median patient age at 68, with 79% women.
Dr. Walker's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Walker's Medicare patients by sex, 2024
- Women53883%
- Men10717%
Chronic conditions among Dr. Walker's Medicare patients, 2024
- High cholesterol75%
- High blood pressure58%
- Arthritis43%
- Osteoporosis33%
- Mood disorders25%
- Depression24%
- Ischemic heart disease19%
- Anxiety18%
Share of Medicare patients with each condition. A patient can have several.
Dr. Walker's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women79%
- Men20%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gay McManus Walker wrote 5,648 Medicare Part D claims in 2024
In 2024, Dr. Walker wrote 5,648 Medicare Part D claims for 665 patients. 91% of them were for generic drugs. CMS names the drug for 4,931 of them, across 84 drugs with 11 or more claims each, at $171,942 in total drug cost. In 2023, CMS named 5,716 claims across 99 drugs.
Dr. Walker's Part D claims by kind of drug, 2024
- Generic5,163 claims91%
- Brand-name and other485 claims9%
Dr. Walker'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. Walker's Part D claims, 2024
- Opioids0%16 of 5,648 claims
- Antibiotics1%66 of 5,648 claims
- Antipsychotics, patients 65 and over0%19 of 5,648 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: 5,7162024: 4,93114%
Drugs named by CMS: 84 in 2024, 99 in 2023.
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. Gay McManus Walker offers telehealth to Medicare patients
Dr. Walker accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Walker as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Gay McManus Walker received $70 in industry payments from 2017 to 2021
CMS Open Payments shows 4 general payments to Dr. Walker from 2 drug and device companies from 2017 to 2021. Education make up the largest share, 59% of the total. Boehringer Ingelheim Pharmaceuticals, Inc. paid the most, $42.
General payments to Dr. Walker by program year, 2017 to 2021
General payments to Dr. Walker by kind, 2017 to 2021
- Education$4259%
- Food and beverage$2941%
Companies that paid Dr. Walker the most, 2017 to 2021
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Gay McManus Walker graduated from UC San Diego School of Medicine
Dr. Walker graduated from UC San Diego School of Medicine in 1987.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Gay McManus Walker accepts plans from 9 insurance carriers
Dr. Walker is in network with 9 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Elevance. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- Elevance
- United Healthcare
- Blue Cross Blue Shield of Massachusetts
- HCSC
- Regence Health Plans
- Blue Cross and Blue Shield of Kansas City
- +1 more carriersWith a free account
Plan types Dr. Walker accepts, by number of carriers
- Medicare7
- PPO7
- HMO4
- POS4
- EPO2
Source: Dmand AI Insurance Network Data
Sources for Dr. Gay McManus Walker's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare 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 percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Gay McManus Walker
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. Gay McManus Walker's NPI number?
Dr. Gay McManus Walker's NPI number is 1043587009. It was assigned on November 18, 2011, and it is active in the NPI Registry.
What kind of doctor is Dr. Gay McManus Walker?
Dr. Gay McManus Walker is an internist in Encinitas, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Gay McManus Walker practice?
Dr. Walker practices at 477 N El Camino Real Suite C-100, Encinitas, CA 92024. Dr. Walker's primary practice is UCSD Center for Surgery of Encinitas in Encinitas, California. Dmand AI also links Dr. Walker to 2 hospitals, 2 home health agencies, 1 group practice or clinic, 1 skilled nursing facility and 1 ambulatory surgery center.
What is Dr. Gay McManus Walker's office phone number?
The practice phone on file for Dr. Walker is (760) 942-8800.
What is Dr. Gay McManus Walker's medical license number?
Dr. Walker holds California license G63605.
Which hospitals is Dr. Gay McManus Walker affiliated with?
Dr. Walker is affiliated with Scripps Memorial Hospital Encinitas. Dmand AI links Dr. Walker to 2 more hospitals.
What medical group is Dr. Gay McManus Walker part of?
Dr. Walker is linked to Scripps Clinic Medical Group.
Does Dr. Gay McManus Walker accept Medicare?
Yes. CMS data shows Dr. Walker billed Medicare for 2,180 services in 2024, and Dr. Walker accepts Medicare assignment.
Does Dr. Gay McManus Walker offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Walker as offering telehealth services.
How many Medicare patients does Dr. Gay McManus Walker see?
CMS counts 645 Medicare patients who saw Dr. Walker in 2024, with an average age of 77.
Show 7 more questionsShow fewer questions
Is Dr. Gay McManus Walker board certified?
Yes. Dr. Walker is board certified in internal medicine by the American Board of Internal Medicine.
What services does Dr. Gay McManus Walker bill to Medicare?
In 2024, Dr. Walker's most billed Medicare services were medicare service (G2211), office visit, established patient (99215) and office visit, established patient (99214).
Where did Dr. Gay McManus Walker go to medical school?
Dr. Walker graduated from UC San Diego School of Medicine in 1987.
What drugs does Dr. Gay McManus Walker prescribe most?
In 2024 Medicare Part D data, Dr. Walker's most prescribed drugs by claims were Atorvastatin Calcium, Levothyroxine Sodium and Rosuvastatin Calcium.
Has Dr. Gay McManus Walker received payments from drug or device companies?
CMS Open Payments shows $70 in general payments to Dr. Walker from 2 companies from 2017 to 2021. The largest total came from Boehringer Ingelheim Pharmaceuticals, Inc.
How long has Dr. Gay McManus Walker been practicing?
Dr. Walker graduated from medical school in 1987, 39 years ago.
What insurance does Dr. Gay McManus Walker accept?
Dr. Walker is in network with 9 carriers, including Aetna, Blue Cross Blue Shield of Michigan and Elevance. Medicare plans come from the most carriers, 7. Check the plan with the practice before a visit.
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