Dr. Mark Alan Fierro, MD
- Part D claims, 2024
- 46
- Hospital affiliations
- 1
- Industry payments
- $22,842
- Medical groups
- 2
- State licenses
- 2
- Practice address
- 2425 Samaritan Drive, San Jose, CA 95124
- Practice phone
- Call (408) 559-2011
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Fierro's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Mark Alan Fierro is an OB-GYN in San Jose, California
Dr. Fierro practices at Good Samaritan Hospital in San Jose, California, part of HCA Healthcare.
Dr. Fierro's NPI, 1114155496, was assigned on June 25, 2009. Dr. Fierro graduated from Saint Louis University School Of Medicine in 2009. Dr. Fierro holds California license A124997.
- NPI
- 1114155496NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5496115511
- NPI enumeration date
- June 25, 2009
- NPI status
- Active
- Practice phone
- (408) 559-2011
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 2009
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Affiliation Data
Dr. Mark Alan Fierro practices at Good Samaritan Hospital in San Jose, California
Dr. Fierro's primary practice is Good Samaritan Hospital, at 2425 Samaritan Drive, San Jose, CA 95124 in Santa Clara County. The practice phone is (408) 559-2011.
- Good Samaritan Hospital2425 Samaritan Drive, San Jose, CA 95124 · Santa Clara CountyPhone(408) 559-2011
Source: Dmand AI Affiliation Data
Dr. Mark Alan Fierro is affiliated with 1 site of care and 2 medical groups
Dr. Fierro's primary practice is Good Samaritan Hospital in San Jose, California, part of HCA Healthcare. The medical group on file is Obstetrix of California. Dmand AI also links Dr. Fierro to 1 more medical group, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mark Alan Fierro's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Fierro practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Good Samaritan Hospital | Available with a free account |
| +1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark Alan Fierro is one of 4,642 OB-GYNs in California
Obstetrics and gynecology is Dr. Fierro's primary specialty in the NPI Registry, under taxonomy code 207V00000X. Dr. Fierro is board certified in obstetrics & gynecology by the American Board of Obstetrics and Gynecology. Dmand AI has Dr. Fierro's licenses on file in 2 states: California and Missouri.
Specialties and state licenses
- Obstetrics and gynecology, CaliforniaPrimary
- Missouri license
Clinical focus
Dmand AI lists hysterectomy among the conditions Dr. Fierro treats.
OB-GYNs near Dr. Fierro
Counts of OB-GYNs with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Mark Alan Fierro's patients have a median age of 45
Across all payers, Dmand AI patient panel data puts Dr. Fierro's median patient age at 45, with 99% women.
Dr. Fierro's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 45
Patient panel by sex, all payers
- Women99%
- Men0%
Source: Dmand AI Patient Panel Data
Dr. Mark Alan Fierro wrote 46 Medicare Part D claims in 2024
In 2024, Dr. Fierro wrote 46 Medicare Part D claims for 14 patients. 85% of them were for generic drugs. CMS names the drug for 37 of them, across 3 drugs with 11 or more claims each, at $372 in total drug cost. In 2021, CMS named 123 claims across 7 drugs.
Dr. Fierro's Part D claims by kind of drug, 2024
- Generic39 claims85%
- Brand-name and other7 claims15%
Dr. Fierro's most prescribed drugs by claims, 2022
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Part D claims for drugs CMS names, 2021 to 2022
- 2021
- 2022
- Claims for drugs CMS names
- 2021: 1232022: 3770%
Drugs named by CMS: 3 in 2022, 7 in 2021.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
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Dr. Mark Alan Fierro received $22,842 in industry payments from 2016 to 2025
CMS Open Payments shows 866 general payments to Dr. Fierro from 48 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 63% of the total. Duchesnay USA Incorporated paid the most, $8,063.
General payments to Dr. Fierro by program year, 2016 to 2025
General payments to Dr. Fierro by kind, 2016 to 2025
- Food and beverage$14,45663%
- Speaker and faculty fees$7,64033%
- Education$3852%
- Travel and lodging$3612%
Companies that paid Dr. Fierro the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mark Alan Fierro graduated from Saint Louis University School Of Medicine
Dr. Fierro graduated from Saint Louis University School Of Medicine in 2009.
- Medical school
- Board certified in obstetrics & gynecology
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark Alan Fierro's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Mark Alan Fierro
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Mark Alan Fierro's NPI number?
Dr. Mark Alan Fierro's NPI number is 1114155496. It was assigned on June 25, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark Alan Fierro?
Dr. Mark Alan Fierro is an OB-GYN in San Jose, California. The primary specialty in the NPI Registry is Obstetrics & Gynecology Physician (taxonomy code 207V00000X).
Where does Dr. Mark Alan Fierro practice?
Dr. Fierro practices at 2425 Samaritan Drive, San Jose, CA 95124. Dr. Fierro's primary practice is Good Samaritan Hospital in San Jose, California, part of HCA Healthcare. Dmand AI also links Dr. Fierro to 1 medical group.
What is Dr. Mark Alan Fierro's office phone number?
The practice phone on file for Dr. Fierro is (408) 559-2011.
What is Dr. Mark Alan Fierro's medical license number?
Dr. Fierro holds California license A124997, one of the licenses on file in 2 states.
Which states has Dr. Mark Alan Fierro been licensed in?
Dmand AI has state licenses on file for Dr. Fierro in California (2013 to 2026) and Missouri (2013 to 2014).
Which hospitals is Dr. Mark Alan Fierro affiliated with?
Dr. Fierro practices at Good Samaritan Hospital in San Jose, California.
What medical group is Dr. Mark Alan Fierro part of?
Dr. Fierro is linked to Obstetrix of California. Dmand AI links Dr. Fierro to 1 more medical group.
Is Dr. Mark Alan Fierro board certified?
Yes. Dr. Fierro is board certified in obstetrics & gynecology by the American Board of Obstetrics and Gynecology.
Where did Dr. Mark Alan Fierro go to medical school?
Dr. Fierro graduated from Saint Louis University School Of Medicine in 2009.
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What drugs does Dr. Mark Alan Fierro prescribe most?
In 2022 Medicare Part D data, Dr. Fierro's most prescribed drugs by claims were Atorvastatin Calcium, Zolpidem Tartrate and Alprazolam.
Has Dr. Mark Alan Fierro received payments from drug or device companies?
CMS Open Payments shows $22,842 in general payments to Dr. Fierro from 48 companies from 2016 to 2025. The largest total came from Duchesnay USA Incorporated.
How long has Dr. Mark Alan Fierro been practicing?
Dr. Fierro graduated from medical school in 2009, 17 years ago.
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