Dr. Peter D. Mazonson, MD
- Part D claims, 2024
- 643
- Publications
- 29
- MIPS score, 2024
- 61
- Hospital affiliations
- 1
- Industry payments
- $19,209
- Practice address
- 500 Tully Rd, San Jose, CA 95111
- Practice phone
- Call (408) 885-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Valley Health Center Tully - San Jose
Urgent Care Center · San Jose, California
Find Dr. Mazonson'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. Peter D. Mazonson is an internist in San Jose, California
Dr. Mazonson practices at Valley Health Center Tully - San Jose in San Jose, California.
Dr. Mazonson's NPI, 1811953391, was assigned on April 25, 2006. Dr. Mazonson graduated from Geisel School Of Medicine At Dartmouth in 1982. Dr. Mazonson holds California license G61502.
- NPI
- 1811953391NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5890988265
- NPI enumeration date
- April 25, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (408) 885-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 70
- Medical school graduation
- 1982
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Peter D. Mazonson practices at Valley Health Center Tully - San Jose in San Jose, California
Dr. Mazonson's primary practice is Valley Health Center Tully - San Jose, at 500 Tully Rd, San Jose, CA 95111. The practice phone is (408) 885-5000.
- Valley Health Center Tully - San Jose500 Tully Rd, San Jose, CA 95111Phone(408) 885-5000
Source: Dmand AI Affiliation Data
Dr. Peter D. Mazonson is affiliated with 3 sites of care and 1 medical group
Dr. Mazonson's primary practice is Valley Health Center Tully - San Jose in San Jose, California. Dr. Mazonson is also affiliated with Santa Clara Valley Medical Center. The medical group on file is County of Santa Clara Behavioral Health Services, Las Plumas Behavioral Health Clinic. Dmand AI also links Dr. Mazonson to 1 more breast imaging center, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Peter D. Mazonson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Mazonson practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Valley Health Center Tully - San Jose | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Peter D. Mazonson is one of 16,751 internists in California
Internal medicine is Dr. Mazonson's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Mazonson is board certified in internal medicine by the American Board of Internal Medicine. Dmand AI has Dr. Mazonson's licenses on file in 2 states: California and North Carolina.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
- North Carolina license
Clinical focus
Dmand AI lists chronic diabetes, chronic hypertension, high cholesterol, lower back pain, muscle pain, fibromyalgia, and limb pain, rash and skin cyst among the conditions Dr. Mazonson treats.
Internists near Dr. Mazonson
Counts of internists 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. Peter D. Mazonson's patients have a median age of 70
Across all payers, Dmand AI patient panel data puts Dr. Mazonson's median patient age at 70, with 65% women.
Dr. Mazonson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women65%
- Men35%
Source: Dmand AI Patient Panel Data
Dr. Peter D. Mazonson wrote 643 Medicare Part D claims in 2024
In 2024, Dr. Mazonson wrote 643 Medicare Part D claims for 55 patients. 83% of them were for generic drugs. CMS names the drug for 419 of them, across 19 drugs with 11 or more claims each, at $55,652 in total drug cost. In 2023, CMS named 488 claims across 22 drugs.
Dr. Mazonson's Part D claims by kind of drug, 2024
- Generic532 claims83%
- Brand-name and other111 claims17%
Dr. Mazonson's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Mazonson's Part D claims, 2024
- Antibiotics2%11 of 643 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 4882024: 41914%
Drugs named by CMS: 19 in 2024, 22 in 2023.
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
Dr. Peter D. Mazonson scored 61 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 61 out of 100 for Dr. Mazonson for performance year 2024, reported as part of a group. Dr. Mazonson accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Mazonson's MIPS scores, performance year 2024
- 61of 100Final score
- 59.4of 100Quality
- 0of 100Promoting Interoperability
- 40of 100Improvement Activities
- 71of 100Cost
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Peter D. Mazonson has 29 publications on record
Dmand AI links 29 papers to Dr. Mazonson, published from 2012 to 2023. 2020 was the busiest year, with 4. The most frequent topics are HIV Infections, Cost-Benefit Analysis and Anxiety. Dr. Mazonson has published most often in AIDS Res Hum Retroviruses. Dr. Mazonson's most frequent co-authors are John Randolph Balmes, MD, Bruce L. Gilliam, MD and Philip Magnus Grant, MD.
Dr. Mazonson's papers by year, 2012 to 2023
Topics Dr. Mazonson writes about most
- HIV Infections
- Cost-Benefit Analysis
- Anxiety
- Decision Support Techniques
- Health Care Costs
- Markov Chains
- Models, Economic
- Practice Patterns, Physicians'
Dr. Mazonson's most frequent co-authors
- John Randolph Balmes, MD1 shared paper
- Bruce L. Gilliam, MD1 shared paper
- Philip Magnus Grant, MD1 shared paper
Recent publications by Dr. Mazonson
AIDS Behav
AIDS Res Hum Retroviruses
See who Dr. Mazonson researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Mazonson works with, so you can find a warm path to the right internists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Peter D. Mazonson received $19,209 in industry payments from 2016 to 2017
CMS Open Payments shows 18 general payments to Dr. Mazonson from 1 drug or device company from 2016 to 2017. Consulting fees make up the largest share, 87% of the total. Johnson & Johnson Health Care Systems Inc. paid the most, $19,209.
General payments to Dr. Mazonson by program year, 2016 to 2017
General payments to Dr. Mazonson by kind, 2016 to 2017
- Consulting fees$16,64487%
- Travel and lodging$2,11811%
- Food and beverage$4472%
Companies that paid Dr. Mazonson the most, 2016 to 2017
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Peter D. Mazonson graduated from Geisel School Of Medicine At Dartmouth
Dr. Mazonson graduated from Geisel School Of Medicine At Dartmouth in 1982.
- Medical school
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Peter D. Mazonson accepts plans from 6 insurance carriers
Dr. Mazonson is in network with 6 carriers, including Elevance, Aetna and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 5. Check the plan with the practice before a visit.
- Elevance
- Aetna
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- HCSC
- CMS Medicare
Plan types Dr. Mazonson accepts, by number of carriers
- Medicare5
- PPO5
- HMO3
- POS3
- EPO1
Source: Dmand AI Insurance Network Data
Sources for Dr. Peter D. Mazonson'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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Peter D. Mazonson
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. Peter D. Mazonson's NPI number?
Dr. Peter D. Mazonson's NPI number is 1811953391. It was assigned on April 25, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Peter D. Mazonson?
Dr. Peter D. Mazonson is an internist in San Jose, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Peter D. Mazonson practice?
Dr. Mazonson practices at 500 Tully Rd, San Jose, CA 95111. Dr. Mazonson's primary practice is Valley Health Center Tully - San Jose in San Jose, California. Dmand AI also links Dr. Mazonson to 1 breast imaging center.
What is Dr. Peter D. Mazonson's office phone number?
The practice phone on file for Dr. Mazonson is (408) 885-5000.
What is Dr. Peter D. Mazonson's medical license number?
Dr. Mazonson holds California license G61502, one of the licenses on file in 2 states.
Which states has Dr. Peter D. Mazonson been licensed in?
Dmand AI has state licenses on file for Dr. Mazonson in California (1987 to 2027) and North Carolina (1984 to 1988).
Which hospitals is Dr. Peter D. Mazonson affiliated with?
Dr. Mazonson is affiliated with Santa Clara Valley Medical Center.
What medical group is Dr. Peter D. Mazonson part of?
Dr. Mazonson is linked to County of Santa Clara Behavioral Health Services, Las Plumas Behavioral Health Clinic.
Does Dr. Peter D. Mazonson accept Medicare?
Yes. CMS lists Dr. Mazonson as accepting Medicare assignment.
What is Dr. Peter D. Mazonson's MIPS score?
Dr. Mazonson's MIPS final score for performance year 2024 is 61 out of 100, reported as part of a group.
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Is Dr. Peter D. Mazonson board certified?
Yes. Dr. Mazonson is board certified in internal medicine by the American Board of Internal Medicine.
Where did Dr. Peter D. Mazonson go to medical school?
Dr. Mazonson graduated from Geisel School Of Medicine At Dartmouth in 1982.
What drugs does Dr. Peter D. Mazonson prescribe most?
In 2024 Medicare Part D data, Dr. Mazonson's most prescribed drugs by claims were Metformin HCl, Atorvastatin Calcium and Omeprazole.
Has Dr. Peter D. Mazonson received payments from drug or device companies?
CMS Open Payments shows $19,209 in general payments to Dr. Mazonson from 1 company from 2016 to 2017. The largest total came from Johnson & Johnson Health Care Systems Inc.
How long has Dr. Peter D. Mazonson been practicing?
Dr. Mazonson graduated from medical school in 1982, 44 years ago.
Does Dr. Peter D. Mazonson do research?
Dmand AI links 29 publications to Dr. Mazonson, published from 2012 to 2023.
Who does Dr. Peter D. Mazonson publish with?
Dr. Mazonson's most frequent co-authors are John Randolph Balmes, MD (1 shared paper), Bruce L. Gilliam, MD (1 shared paper) and Philip Magnus Grant, MD (1 shared paper).
What insurance does Dr. Peter D. Mazonson accept?
Dr. Mazonson is in network with 6 carriers, including Elevance, Aetna and Blue Cross Blue Shield of Michigan. Medicare plans come from the most carriers, 5. Check the plan with the practice before a visit.
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