NPPES file of Aug 9, 2026

Maria Susan Afable Buhay-Maglunog, M.D.

Rheumatology Physician · West Covina, CA

Maria Susan Afable Buhay-Maglunog, M.D. is a rheumatology physician with a practice address in West Covina, California, and NPI 1699744524, issued on Mar 14, 2006. Check the license (California A42390, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1699744524
Name
Maria Susan Afable Buhay-Maglunog
Credential
M.D.
Primary taxonomy
Rheumatology Physician 207RR0500X
License number
A42390 CA
Self-reported in NPPES; status is on the state search
Practice location
1250 S Sunset Ave, West Covina, CA 91790
Phone
(626) 962-3254
Enumerated
Mar 14, 2006
Record last updated
Oct 21, 2011 (not updated in 15 years: call before relying on the address or phone)
Fax
(626) 962-1266
Medicare enrollment
Enrolled (PECOS I20090511000548); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest rheumatology physician records → All 926 in California → Look up another NPI →

Also registered at 1250 S Sunset Ave

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Arlene CalderonMassage Therapist1578266334
  2. Sharon Choi, M.D.Specialist1740340009
  3. Lydia Chow, M.D.Hematology & Oncology Physician1770087314
  4. Karyn Francis, N.P.Family Nurse Practitioner1811925050
  5. Buford Harmon, P.T.Physical Therapist1275505653
  6. Alexander Maglunog, M.D.Surgery Physician1508835430

Verify Maria Susan Afable Buhay-Maglunog in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license A42390    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the California license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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16% more Medicare Part D claims than the average rheumatology physician in 2024

2,303 Medicare Part D claims for 412 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. 32 claims were for opioids.

  1. Maria Susan Buhay-Maglunog2,303
  2. Specialty average1,978

Most prescribed

  1. Methotrexate389 claims
  2. Prednisone265 claims
  3. Hydroxychloroquine Sulfate221 claims
  4. Prolia149 claims
  5. Alendronate Sodium116 claims
  6. Enbrel Sureclick105 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: $2,284.61

109 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. The 4,486 providers of this specialty with any payment received $8,538.33 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Maria Susan Buhay-Maglunog$2,284.61
  2. Specialty average$8,538.33

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Maria Susan Afable Buhay-Maglunog among 926 rheumatology physician records in California

Maria Susan Afable Buhay-Maglunog, M.D. is one of 926 rheumatology physician records with a practice address in California. 81% 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 6% of them.

  • NPI issued2006 · 6% of these records are older, 55% newer
  • In a Medicare fileYes · 81% of these records are
  • In the CMS Doctors and Clinicians fileYes · 69% of these records are
  • Graduated1977 · median 2003 among the 641 with a school on file
  • Record last updated2011 · 62% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Rheumatology Physician providers in California

There are 926 rheumatology physician records in California.

All 926 in California → Every provider in West Covina → Rheumatology Physician nationwide →

The 8 rheumatology physician records with the nearest ZIP codes

  1. Antony Hou, M.D.Upland, CA 917861114926367
  2. Morris Kokhab, M.D.Upland, CA 917861245248681
  3. Thang Le, MDUpland, CA 917861760559819
  4. Ebrahim Sadeghi Najafabadi, M.D.Upland, CA 917861205156866
  5. Wai Chung Yong, MDAlhambra, CA 918011740695790
  6. Huynh Tran, MD, DPDRosemead, CA 917701649566571
  7. Jaffar Tremazi, MDPomona, CA 917671649248782
  8. Emmanuel Katsaros, D.O.Pomona, CA 917661144240961

Common questions

What is Maria Susan Afable Buhay-Maglunog, M.D.'s NPI number?

Maria Susan Afable Buhay-Maglunog, M.D.'s National Provider Identifier (NPI) is 1699744524, issued on Mar 14, 2006. An NPI identifies a provider in billing; it is not a license.

Where is Maria Susan Afable Buhay-Maglunog, M.D. located?

The NPPES record lists a practice address at 1250 S Sunset Ave, West Covina, CA, 91790. Phone: (626) 962-3254. Providers update this record themselves, so call before visiting.

How can I verify Maria Susan Afable Buhay-Maglunog, M.D.'s license?

NPPES lists California license number A42390, 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 Maria Susan Afable Buhay-Maglunog, M.D. prescribe under Medicare Part D?

In 2024, Maria Susan Afable Buhay-Maglunog, M.D. had 2,303 Medicare Part D claims for 412 beneficiaries; the average among rheumatology physician prescribers was 1,978. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.