Melissa Ann Frederick, M.D.
Internal Medicine Physician · Millbrae, CA
Melissa Ann Frederick, M.D. is an internal medicine physician with a practice address in Millbrae, California, and NPI 1033238076, issued on Mar 29, 2007. Check the license (California A116626, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Melissa Ann Frederick
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- A116626 CA
4301084237 MI
Self-reported in NPPES; status is on the state search - Practice location
- 423 Broadway, Millbrae, CA 94030
- Phone
- (650) 732-9721
- Enumerated
- Mar 29, 2007
- Record last updated
- Feb 21, 2015 (not updated in 11 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20121003000395); accepts Medicare assignment
- Medical or professional school
- Medical College Of Ohio, 2004
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 423 Broadway
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Melissa Ann Frederick in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A116626Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.5 times the Medicare Part D claims of the average internal medicine physician in 2024
11,099 Medicare Part D claims for 230 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 249 claims were for opioids.
Most prescribed
- Atorvastatin Calcium861 claims
- Gabapentin458 claims
- Amlodipine Besylate399 claims
- Furosemide378 claims
- Levothyroxine Sodium351 claims
- Eliquis310 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.
The MIPS final score for 2023 (Medicare payment program): 100 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Acn Medical Group IncMillbrae, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Melissa Ann Frederick among 17,696 internal medicine physician records in California
Melissa Ann Frederick, 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
- Graduated2004 · median 2004 among the 11,065 with a school on file
- Record last updated2015 · 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).
3 internal medicine physician records list a practice address in Millbrae
They are 3 of the 164 NPPES records with a practice address in Millbrae, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Millbrae → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Jie LingMillbrae, CA 940301003187766
- Andrew Ng, MDMillbrae, CA 940301871716910
- Sylvia Friedberg, M.D.Portola Valley, CA 940281396886925
- Kathryn Hallsten, M.D.Portola Valley, CA 940281184750861
- Rebecca LongPortola Valley, CA 940281639007172
- Emma Morton-Bours, M.D.Portola Valley, CA 940281316003528
- Gerard Sarnat, M.D.Portola Valley, CA 940281750658415
- Ning Tang, M.D.Portola Valley, CA 940281790806131
Common questions
What is Melissa Ann Frederick, M.D.'s NPI number?
Melissa Ann Frederick, M.D.'s National Provider Identifier (NPI) is 1033238076, issued on Mar 29, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Melissa Ann Frederick, M.D. located?
The NPPES record lists a practice address at 423 Broadway, Millbrae, CA, 94030. Phone: (650) 732-9721. Providers update this record themselves, so call before visiting.
How can I verify Melissa Ann Frederick, M.D.'s license?
NPPES lists California license number A116626, 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 Melissa Ann Frederick, M.D. prescribe under Medicare Part D?
In 2024, Melissa Ann Frederick, M.D. had 11,099 Medicare Part D claims for 230 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
What is Melissa Ann Frederick, M.D.'s MIPS final score?
The 2023 MIPS final score is 100 of 100. The average among 454,083 clinicians with a measured score was 83.5.
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.