Claudia Una Pfeil, M.D.
Internal Medicine Physician · Pasadena, CA
Claudia Una Pfeil, M.D. is an internal medicine physician with a practice address in Pasadena, California, and NPI 1639367584, issued on Oct 4, 2007. Check the license (California A77073, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Claudia Una Pfeil
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- A77073 CA
Self-reported in NPPES; status is on the state search - Practice location
- 401 S Fair Oaks Ave, Pasadena, CA 91105
- Phone
- (626) 795-7556
- Enumerated
- Oct 4, 2007
- Record last updated
- Oct 27, 2023
- Medicare enrollment
- Enrolled (PECOS I20050622001449); accepts Medicare assignment
- Medical or professional school
- University Of Maryland School Of Medicine, 2000
- 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 401 S Fair Oaks Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Claudia Una Pfeil in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A77073Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
61% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,252 Medicare Part D claims for 620 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims. 14 claims were for opioids.
Most prescribed
- Atorvastatin Calcium81 claims
- Amlodipine Besylate78 claims
- Losartan Potassium60 claims
- Lisinopril57 claims
- Albuterol Sulfate Hfa47 claims
- Levothyroxine Sodium45 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.
Bills Medicare through one group practice
- Southern California Permanente Medical GroupLos Angeles, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Claudia Una Pfeil among 17,696 internal medicine physician records in California
Claudia Una Pfeil, 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 2007, is newer than 44% of them.
- NPI issued2007 · 44% of these records are older, 44% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated2000 · 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 →
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Common questions
What is Claudia Una Pfeil, M.D.'s NPI number?
Claudia Una Pfeil, M.D.'s National Provider Identifier (NPI) is 1639367584, issued on Oct 4, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Claudia Una Pfeil, M.D. located?
The NPPES record lists a practice address at 401 S Fair Oaks Ave, Pasadena, CA, 91105. Phone: (626) 795-7556. Providers update this record themselves, so call before visiting.
How can I verify Claudia Una Pfeil, M.D.'s license?
NPPES lists California license number A77073, 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 Claudia Una Pfeil, M.D. prescribe under Medicare Part D?
In 2024, Claudia Una Pfeil, M.D. had 1,252 Medicare Part D claims for 620 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.