Gay McManus Walker, M.D.
Internal Medicine Physician · Encinitas, CA
Gay McManus Walker, M.D. is an internal medicine physician with a practice address in Encinitas, California, and NPI 1043587009, issued on Nov 18, 2011. Check the license (California G63605, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Gay McManus Walker
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G63605 CA
Self-reported in NPPES; status is on the state search - Practice location
- 477 N EL Camino Real, Encinitas, CA 92024
- Phone
- (760) 479-3900
- Enumerated
- Nov 18, 2011
- Record last updated
- Feb 13, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (760) 479-3923
- Medicare enrollment
- Enrolled (PECOS I20120125000889); accepts Medicare assignment
- Medical or professional school
- University Of California, San Diego School Of Medicine, 1987
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 477 N EL Camino Real
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Angel Bair, NPNurse Practitioner1235218389
- Elizabeth Bartolomeo, ANPAdult Health Nurse Practitioner1952532095
- Donna Beck, PHDMarriage & Family Therapist1780015362
- Robert Brunst, MD PHDFamily Medicine Physician1639257546
- Jennifer Cates, PA-CMedical Physician Assistant1972622751
- Mary Ann Cathey, FNPFamily Nurse Practitioner1013995604
Verify Gay McManus Walker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G63605Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
78% more Medicare Part D claims than the average internal medicine physician in 2024
5,648 Medicare Part D claims for 665 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 16 claims were for opioids.
Most prescribed
- Atorvastatin Calcium494 claims
- Levothyroxine Sodium435 claims
- Rosuvastatin Calcium330 claims
- Amlodipine Besylate280 claims
- Losartan Potassium237 claims
- Alendronate Sodium175 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Gay McManus Walker among 17,696 internal medicine physician records in California
Gay McManus Walker, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 66% of them.
- NPI issued2011 · 66% of these records are older, 32% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1987 · median 2004 among the 11,065 with a school on file
- Record last updated2017 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
63 internal medicine physician records list a practice address in Encinitas
They are 63 of the 1,874 NPPES records with a practice address in Encinitas, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Encinitas → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Sonia Ahuja, M.D.Encinitas, CA 920241528059490
- Robert Bickerton, M.D.Encinitas, CA 920241992778765
- Dolly Doctor, MDEncinitas, CA 920241205871456
- Taiye Gilles, M.D.Encinitas, CA 920241841232733
- Robert Huang, M.D.Encinitas, CA 920241164423851
- James Labelle, M.D.Encinitas, CA 920241750381372
- Robert Matorin, M.D.Encinitas, CA 920241972525343
- Alexie Nguyen, M.D.Encinitas, CA 920241659367613
Common questions
What is Gay McManus Walker, M.D.'s NPI number?
Gay McManus Walker, M.D.'s National Provider Identifier (NPI) is 1043587009, issued on Nov 18, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Gay McManus Walker, M.D. located?
The NPPES record lists a practice address at 477 N EL Camino Real, Encinitas, CA, 92024. Phone: (760) 479-3900. Providers update this record themselves, so call before visiting.
How can I verify Gay McManus Walker, M.D.'s license?
NPPES lists California license number G63605, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Gay McManus Walker, M.D. prescribe under Medicare Part D?
In 2024, Gay McManus Walker, M.D. had 5,648 Medicare Part D claims for 665 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.