NPPES file of Aug 9, 2026

Spenser Harvey Perloff, M.D.

Obstetrics & Gynecology Physician · San Ramon, CA

Spenser Harvey Perloff, M.D. is an obstetrics & gynecology physician with a practice address in San Ramon, California, and NPI 1861855272, issued on Apr 1, 2016. Check the license (California C200957, 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 2023 and 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1861855272
Name
Spenser Harvey Perloff
Credential
M.D.
Primary taxonomy
Obstetrics & Gynecology Physician 207V00000X
License numbers
C200957 CA
2022049875 MO
37070 OK
Self-reported in NPPES; status is on the state search
Practice location
12677 Alcosta Blvd, San Ramon, CA 94583
Phone
(925) 254-9840
Enumerated
Apr 1, 2016
Record last updated
Mar 26, 2025
Medicare enrollment
Enrolled (PECOS I20250403000892); accepts Medicare assignment
Telehealth
Offers telehealth (CMS)
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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Verify Spenser Harvey Perloff in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersMedical Board of California
    Search for license C200957
    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

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80% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024

33 Medicare Part D claims for 12 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.

  1. Spenser Perloff33
  2. Specialty average165

Most prescribed

  1. Dotti11 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 practice group's MIPS final score for 2023 (Medicare payment program): 86.9 of 100

The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.

  1. Qualityout of 100 · 30% of the final score77.5
  2. Costout of 100 · 30%57.7
  3. Promoting interoperabilityout of 100 · 25%100.0
  4. Improvement activities40 of 40 points · 15%100.0

Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).

Industry payments in 2024: $21.46

1 payment: food and beverage; the largest payer was Stryker Corporation. The 21,429 providers of this specialty with any payment received $1,030.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Spenser Perloff$21.46
  2. Specialty average$1,030.61

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

  1. John Muir Physician NetworkPleasant Hill, CA

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).

Spenser Harvey Perloff among 5,088 obstetrics & gynecology physician records in California

Spenser Harvey Perloff, M.D. is one of 5,088 obstetrics & gynecology physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 85% of them.

  • NPI issued2016 · 85% of these records are older, 13% newer
  • In a Medicare fileYes · 74% of these records are
  • In the CMS Doctors and Clinicians fileYes · 53% of these records are
  • Graduated2016 · median 2004 among the 2,700 with a school on file
  • Record last updated2025 · 64% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

Obstetrics & Gynecology Physician providers in California

There are 5,088 obstetrics & gynecology physician records in California.

The 8 obstetrics & gynecology physician records with the nearest ZIP codes

  1. Ravi Agarwal, MDSan Ramon, CA 945831710331236
  2. Curtis Appel, MDSan Ramon, CA 945831831279314
  3. Emil Eyvazzadeh, MDSan Ramon, CA 945831881702462
  4. Renee Hilliard, M.D.San Ramon, CA 945831245265065
  5. Leroy Leabman, MDSan Ramon, CA 945831598041360
  6. Mark Lollar, MDSan Ramon, CA 945831124119623
  7. Helen Matthews, M.D.San Ramon, CA 945831013015627
  8. Cassandra MellingerSan Ramon, CA 945831811647803

Common questions

What is Spenser Harvey Perloff, M.D.'s NPI number?

Spenser Harvey Perloff, M.D.'s National Provider Identifier (NPI) is 1861855272, issued on Apr 1, 2016. An NPI identifies a provider in billing; it is not a license.

Where is Spenser Harvey Perloff, M.D. located?

The NPPES record lists a practice address at 12677 Alcosta Blvd, San Ramon, CA, 94583. Phone: (925) 254-9840. Providers update this record themselves, so call before visiting.

How can I verify Spenser Harvey Perloff, M.D.'s license?

NPPES lists California license number C200957, 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 Spenser Harvey Perloff, M.D. prescribe under Medicare Part D?

In 2024, Spenser Harvey Perloff, M.D. had 33 Medicare Part D claims for 12 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.

What is Spenser Harvey Perloff, M.D.'s MIPS final score?

The 2023 MIPS final score is 86.9 of 100, reported for the practice group. 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.