Richard K. Petyn, M.D.
Internal Medicine Physician · Oceanside, CA
Richard K. Petyn, M.D. is an internal medicine physician with a practice address in Oceanside, California, and NPI 1376625004, issued on Oct 20, 2006. Check the license (California A51659, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Richard K. Petyn
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A51659 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4318 Mission Ave, Oceanside, CA 92057
- Phone
- (760) 901-5060
- Enumerated
- Oct 20, 2006
- Record last updated
- Aug 12, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (760) 722-2204
- Medicare enrollment
- Enrolled (PECOS I20031210001188); accepts Medicare assignment
- 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 4318 Mission Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Madalasa Bista, M.D.Family Medicine Physician1174966444
- Michelle Buxton, PA-CMedical Physician Assistant1326076043
- Nancy Chang, DOFamily Medicine Physician1710241559
- Connie Chen, MDFamily Medicine Physician1851319693
Verify Richard K. Petyn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A51659Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
64% more Medicare Part D claims than the average internal medicine physician in 2024
5,201 Medicare Part D claims for 530 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 54 claims were for opioids.
Most prescribed
- Atorvastatin Calcium469 claims
- Losartan Potassium311 claims
- Amlodipine Besylate310 claims
- Metformin Hcl Er292 claims
- Levothyroxine Sodium253 claims
- Tamsulosin Hcl197 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.
Industry payments in 2024: $88.26
4 payments; by number, the most common kind was food and beverage; the largest payer was Novo Nordisk Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Scripps HealthOceanside, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Richard K. Petyn among 17,696 internal medicine physician records in California
Richard K. Petyn, 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 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1982 · median 2004 among the 11,065 with a school on file
- Record last updated2013 · 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).
Internal Medicine Physician providers in California
There are 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Oceanside → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Manika Talati, DOOceanside, CA 920571194250654
- Kathleen Torres, MDOceanside, CA 920571831109974
- May Al-Mukhtar, MDOceanside, CA 920581437809704
- David Antoun, MDOceanside, CA 920561043573785
- Nancy Chang, M.D.Oceanside, CA 920561386635621
- Paul Dang, MDOceanside, CA 920561801882592
- Richard Day, MDOceanside, CA 920561386716959
- Kaveh Farhoomand, DOOceanside, CA 920561447249040
Common questions
What is Richard K. Petyn, M.D.'s NPI number?
Richard K. Petyn, M.D.'s National Provider Identifier (NPI) is 1376625004, issued on Oct 20, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Richard K. Petyn, M.D. located?
The NPPES record lists a practice address at 4318 Mission Ave, Oceanside, CA, 92057. Phone: (760) 901-5060. Providers update this record themselves, so call before visiting.
How can I verify Richard K. Petyn, M.D.'s license?
NPPES lists California license number A51659, 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 Richard K. Petyn, M.D. prescribe under Medicare Part D?
In 2024, Richard K. Petyn, M.D. had 5,201 Medicare Part D claims for 530 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.