Mary C. Gessner-Peterson, DO
Emergency Medical Services (Emergency Medicine) Physician · Alpine, CA
Mary C. Gessner-Peterson, DO is an emergency medical services (emergency medicine) physician with a practice address in Alpine, California, and NPI 1861662884, issued on Mar 5, 2008. Check the license (California 20A1174, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mary C. Gessner-Peterson
- Credential
- DO
- Primary taxonomy
- Emergency Medical Services (Emergency Medicine) Physician 207PE0004X
- License numbers
- 20A1174 CA
OS014103 PA
Self-reported in NPPES; status is on the state search - Practice location
- 2710 Alpine Blvd # 205, Alpine, CA 91901
- Phone
- (619) 326-4445
- Enumerated
- Mar 5, 2008
- Record last updated
- Sep 26, 2018 (not updated in 8 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20110607000169); accepts Medicare assignment
- Medical or professional school
- Philadelphia College Of Osteopathic Medicine, 2005
- Entity
- Type 1 · individual
8 nearest emergency medical services (emergency medicine) physician records → All 233 in California → Look up another NPI →
Verify Mary C. Gessner-Peterson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A1174Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
143.7 times the Medicare Part D claims of the average emergency medical services (emergency medicine) physician in 2024
41,966 Medicare Part D claims for 1,221 beneficiaries, against an average of 292 among the 1,653 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 820 claims were for opioids.
Most prescribed
- Atorvastatin Calcium2,237 claims
- Pantoprazole Sodium1,626 claims
- Levothyroxine Sodium1,431 claims
- Gabapentin1,369 claims
- Amlodipine Besylate1,362 claims
- Eliquis939 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): 68.5 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).
Industry payments in 2024: $19.70
1 payment: food and beverage; the largest payer was Lilly USA, LLC. The 489 providers of this specialty with any payment received $337.59 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
- Mary Gessner-Peterson Medical Group IncAlpine, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mary C. Gessner-Peterson among 233 emergency medical services (emergency medicine) physician records in California
Mary C. Gessner-Peterson, DO is one of 233 emergency medical services (emergency medicine) physician records with a practice address in California. 69% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 61% of them.
- NPI issued2008 · 61% of these records are older, 31% newer
- In a Medicare fileYes · 69% of these records are
- In the CMS Doctors and Clinicians fileYes · 42% of these records are
- Graduated2005 · median 2002 among the 99 with a school on file
- Record last updated2018 · 68% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207PE0004X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medical Services (Emergency Medicine) Physician providers in California
There are 233 emergency medical services (emergency medicine) physician records in California.
All 233 in California → Every provider in Alpine → Emergency Medical Services (Emergency Medicine) Physician nationwide →
The 8 emergency medical services (emergency medicine) physician records with the nearest ZIP codes
- Talal Al Quraini, M.D.Chula Vista, CA 919111316955446
- Philip Broeckel, MDLa Jolla, CA 920371629146600
- Martin Griglak, MDLa Jolla, CA 920371821166992
- Joseph Viglotti, MDLa Jolla, CA 920371427218858
- Mark HernandezCamp Pendleton, CA 920551952454449
- Allison Auchter, MD, PHDOceanside, CA 920561013595248
- Johnny Negusse, MDRancho Cucamonga, CA 917301881845485
- Shannon Ward, FNPChino, CA 917101437878444
Common questions
What is Mary C. Gessner-Peterson, DO's NPI number?
Mary C. Gessner-Peterson, DO's National Provider Identifier (NPI) is 1861662884, issued on Mar 5, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Mary C. Gessner-Peterson, DO located?
The NPPES record lists a practice address at 2710 Alpine Blvd # 205, Alpine, CA, 91901. Phone: (619) 326-4445. Providers update this record themselves, so call before visiting.
How can I verify Mary C. Gessner-Peterson, DO's license?
NPPES lists California license number 20A1174, 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 Mary C. Gessner-Peterson, DO prescribe under Medicare Part D?
In 2024, Mary C. Gessner-Peterson, DO had 41,966 Medicare Part D claims for 1,221 beneficiaries; the average among emergency medical services (emergency medicine) physician prescribers was 292. Part D covers Medicare prescriptions only.
What is Mary C. Gessner-Peterson, DO's MIPS final score?
The 2023 MIPS final score is 68.5 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.