Muhammad R. Nasir, M.D.
Internal Medicine Physician · Pasadena, CA
Muhammad R. Nasir, M.D. is an internal medicine physician with a practice address in Pasadena, California, and NPI 1427002526, issued on May 22, 2006. Check the license (California A044253, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Muhammad R. Nasir
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A044253 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1403 N Fair Oaks Ave Ste 2, Pasadena, CA 91103
- Phone
- (626) 798-8976
- Enumerated
- May 22, 2006
- Record last updated
- Jan 5, 2023
- Fax
- (626) 794-3010
- Medicaid IDs
- 00A442532 CA
00A442530A CA - Medicare enrollment
- Enrolled (PECOS I20040210000887); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Verify Muhammad R. Nasir in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A044253Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.3 times the Medicare Part D claims of the average internal medicine physician in 2024
10,354 Medicare Part D claims for 318 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 1,688 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen1,036 claims
- Albuterol Sulfate Hfa458 claims
- Gabapentin441 claims
- Oxycodone Hcl396 claims
- Amlodipine Besylate368 claims
- Ibuprofen359 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.
Muhammad R. Nasir among 17,696 internal medicine physician records in California
Muhammad R. Nasir, 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
- Graduated1977 · median 2004 among the 11,065 with a school on file
- Record last updated2023 · 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).
137 internal medicine physician records list a practice address in Pasadena
They are 137 of the 10,525 NPPES records with a practice address in Pasadena, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Pasadena → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Michael Gottlieb, MDPasadena, CA 911031871506808
- Robert Ladines, M.D.Pasadena, CA 911031033219084
- George Sonneborn, AFE23957Pasadena, CA 911031922187962
- Arthur Manoukian, M.D.Pasadena, CA 911041811948540
- Dolores Barba, MDPasadena, CA 911051992700603
- Barry Blum, MDPasadena, CA 911051639141716
- Warren Brown, M.D.Pasadena, CA 911011083776322
- Edmond Clinton, M.D.Pasadena, CA 911011720094097
Common questions
What is Muhammad R. Nasir, M.D.'s NPI number?
Muhammad R. Nasir, M.D.'s National Provider Identifier (NPI) is 1427002526, issued on May 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Muhammad R. Nasir, M.D. located?
The NPPES record lists a practice address at 1403 N Fair Oaks Ave Ste 2, Pasadena, CA, 91103. Phone: (626) 798-8976. Providers update this record themselves, so call before visiting.
How can I verify Muhammad R. Nasir, M.D.'s license?
NPPES lists California license number A044253, 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 Muhammad R. Nasir, M.D. prescribe under Medicare Part D?
In 2024, Muhammad R. Nasir, M.D. had 10,354 Medicare Part D claims for 318 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.