Dr. Mark Benedict Reifenstein, MD
- Medicare services, 2017
- 73
- Part D claims, 2018
- 232
- Industry payments
- $1,120
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 900 E Hamilton Ave, Campbell, CA 95008
- Practice phone
- Call (469) 466-7007
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Signify Health
Campbell, California
Find Dr. Reifenstein'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 Benedict Reifenstein is a family medicine physician in Campbell, California
Dr. Reifenstein practices at Signify Health in Campbell, California.
Dr. Reifenstein's NPI, 1801836770, was assigned on June 7, 2006. Dr. Reifenstein graduated from SUNY Upstate Medical University in 1989. Dr. Reifenstein holds New York license 184059.
- NPI
- 1801836770NPI Registry (opens in a new tab)
- NPI enumeration date
- June 7, 2006
- NPI status
- Active
- Practice phone
- (469) 466-7007
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1989
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Mark Benedict Reifenstein practices at Signify Health in Campbell, California
Dr. Reifenstein's primary practice is Signify Health, at 900 E Hamilton Ave, Campbell, CA 95008 in Santa Clara County. The practice phone is (469) 466-7007.
- Signify Health900 E Hamilton Ave, Campbell, CA 95008 · Santa Clara CountyPhone(469) 466-7007
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Mark Benedict Reifenstein is affiliated with 2 sites of care and 1 medical group
Dr. Reifenstein's primary practice is Signify Health in Campbell, California. The medical group on file is Signify Health. Dmand AI also links Dr. Reifenstein to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Mark Benedict Reifenstein's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Reifenstein practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Signify Health | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark Benedict Reifenstein is one of 15,680 family medicine physicians in California
Family medicine is Dr. Reifenstein's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Reifenstein is licensed in New York.
Specialties and state licenses
- Family medicine, New YorkPrimary
Family medicine physicians near Dr. Reifenstein
Counts of family medicine physicians 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 Benedict Reifenstein billed Medicare for 73 services in 2017
CMS data shows 73 Medicare services from Dr. Reifenstein across 2 procedure codes in 2017, all of them office visits. Medicare paid $3,966 for them. Every service was in an office.
Dr. Reifenstein's Medicare services by type, 2016 to 2017
- 2016
- 2017
- Office and hospital visits
- 2016: 932017: 7322%
Dr. Reifenstein compared with the California median for family medicine physicians, 2017
- Dr. Reifenstein
- California median
- Medicare services
- 73vs 24670% below
- Part D claims
- 232vs 83372% below
Medians across 15,349 family medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Reifenstein's most billed Medicare procedure codes, 2017
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Reifenstein and other family medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark Benedict Reifenstein's patients have a median age of 73
Across all payers, Dmand AI patient panel data puts Dr. Reifenstein's median patient age at 73, with 49% women.
Dr. Reifenstein's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women49%
- Men49%
Source: Dmand AI Patient Panel Data
Dr. Mark Benedict Reifenstein wrote 232 Medicare Part D claims in 2018
In 2018, Dr. Reifenstein wrote 232 Medicare Part D claims. They cover 13 drugs, with $4,837 in total drug cost. In 2017, CMS named 3,655 claims across 96 drugs.
Dr. Reifenstein's most prescribed drugs by claims, 2018
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, 2017 to 2018
- 2017
- 2018
- Claims for drugs CMS names
- 2017: 3,6552018: 23294%
Drugs named by CMS: 13 in 2018, 96 in 2017.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
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Dr. Mark Benedict Reifenstein received $1,120 in industry payments from 2016 to 2017
CMS Open Payments shows 73 general payments to Dr. Reifenstein from 13 drug and device companies from 2016 to 2017. Food and beverage make up the largest share, 100% of the total. Eli Lilly and Company paid the most, $178.
General payments to Dr. Reifenstein by program year, 2016 to 2017
Companies that paid Dr. Reifenstein 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. Mark Benedict Reifenstein graduated from SUNY Upstate Medical University
Dr. Reifenstein graduated from SUNY Upstate Medical University in 1989.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark Benedict Reifenstein'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 | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| 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) |
| 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 Benedict Reifenstein
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 Benedict Reifenstein's NPI number?
Dr. Mark Benedict Reifenstein's NPI number is 1801836770. It was assigned on June 7, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark Benedict Reifenstein?
Dr. Mark Benedict Reifenstein is a family medicine physician in Campbell, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Mark Benedict Reifenstein practice?
Dr. Reifenstein practices at 900 E Hamilton Ave, Campbell, CA 95008. Dr. Reifenstein's primary practice is Signify Health in Campbell, California. Dmand AI also links Dr. Reifenstein to 1 group practice or clinic.
What is Dr. Mark Benedict Reifenstein's office phone number?
The practice phone on file for Dr. Reifenstein is (469) 466-7007.
What is Dr. Mark Benedict Reifenstein's medical license number?
Dr. Reifenstein holds New York license 184059.
What medical group is Dr. Mark Benedict Reifenstein part of?
Dr. Reifenstein is linked to Signify Health.
Does Dr. Mark Benedict Reifenstein accept Medicare?
Yes. CMS data shows Dr. Reifenstein billed Medicare for 73 services in 2017.
What services does Dr. Mark Benedict Reifenstein bill to Medicare?
In 2017, Dr. Reifenstein's most billed Medicare services were office visit, established patient (99214) and office visit, established patient (99213).
Where did Dr. Mark Benedict Reifenstein go to medical school?
Dr. Reifenstein graduated from SUNY Upstate Medical University in 1989.
What drugs does Dr. Mark Benedict Reifenstein prescribe most?
In 2018 Medicare Part D data, Dr. Reifenstein's most prescribed drugs by claims were Atorvastatin Calcium, Omeprazole and Levothyroxine Sodium.
Has Dr. Mark Benedict Reifenstein received payments from drug or device companies?
CMS Open Payments shows $1,120 in general payments to Dr. Reifenstein from 13 companies from 2016 to 2017. The largest total came from Eli Lilly and Company.
How long has Dr. Mark Benedict Reifenstein been practicing?
Dr. Reifenstein graduated from medical school in 1989, 37 years ago.
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