Mark Alan Fierro, M.D.
Obstetrics & Gynecology Physician · Los Gatos, CA
Mark Alan Fierro, M.D. is an obstetrics & gynecology physician with a practice address in Los Gatos, California, and NPI 1114155496, issued on Jun 25, 2009. Check the license (California A124997, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mark Alan Fierro
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License numbers
- A124997 CA
2009015668 MO
Self-reported in NPPES; status is on the state search - Practice location
- 15251 National Ave, Los Gatos, CA 95032
- Phone
- (408) 356-5111
- Enumerated
- Jun 25, 2009
- Record last updated
- Aug 11, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (408) 356-0654
- Medicare enrollment
- Enrolled (PECOS I20230720000923); may accept Medicare assignment
- Medical or professional school
- Saint Louis University School Of Medicine, 2009
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 15251 National Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Noelle Adams, DPTPhysical Therapist1235447707
- Deborah Brown, PA-CMedical Physician Assistant1093802340
- Tony Choi, D.M.D.General Practice Dentistry1669421368
- Genevieve Cleveland, PTPhysical Therapist1659331098
- Richard Contro, MDObstetrics & Gynecology Physician1578737920
- Joan CurriePhysical Therapist1871838904
Verify Mark Alan Fierro in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A124997Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
72% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
46 Medicare Part D claims for 14 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
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: $2,230.24
131 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. 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.
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
- Obstetrix Medical Group OF California A Professional CorporationSan Jose, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark Alan Fierro among 5,088 obstetrics & gynecology physician records in California
Mark Alan Fierro, 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 2009, is newer than 66% of them.
- NPI issued2009 · 66% of these records are older, 30% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2009 · median 2004 among the 2,700 with a school on file
- Record last updated2013 · 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).
37 obstetrics & gynecology physician records list a practice address in Los Gatos
They are 37 of the 1,905 NPPES records with a practice address in Los Gatos, and 5,088 obstetrics & gynecology physician records in California.
All 5,088 in California → Every provider in Los Gatos → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Elizabeth Adie, M.D.Los Gatos, CA 950321578535084
- Jose Bolanos, MDLos Gatos, CA 950321992721989
- Kristine Borrison, MDLos Gatos, CA 950321730144072
- Ling Chen, MDLos Gatos, CA 950321649216888
- Anthony Damore, MDLos Gatos, CA 950321932131307
- Mary Imig, MDLos Gatos, CA 950321194780957
- Karen Kunzel, MDLos Gatos, CA 950321184689911
- Tamara Neuhaus, MDLos Gatos, CA 950321235157892
Common questions
What is Mark Alan Fierro, M.D.'s NPI number?
Mark Alan Fierro, M.D.'s National Provider Identifier (NPI) is 1114155496, issued on Jun 25, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Mark Alan Fierro, M.D. located?
The NPPES record lists a practice address at 15251 National Ave, Los Gatos, CA, 95032. Phone: (408) 356-5111. Providers update this record themselves, so call before visiting.
How can I verify Mark Alan Fierro, M.D.'s license?
NPPES lists California license number A124997, 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 Mark Alan Fierro, M.D. prescribe under Medicare Part D?
In 2024, Mark Alan Fierro, M.D. had 46 Medicare Part D claims for 14 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.