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Dr. James S. Constant, MD
NPI1457439044PAC ID1456548049
- Part D claims, 2024
- 17
- Publications
- 1
- Hospital affiliations
- 1
- Industry payments
- $750
- Medical group
- 1
- Practice address
- 2425 Geary Blvd, San Francisco, CA 94115
- Practice phone
- Call (415) 833-2646
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Constant's professional email, personal email and mobile number
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Dr. James S. Constant is a general surgeon in San Francisco, California
Dr. Constant practices at San Francisco Medical Center in San Francisco, California, part of Kaiser Permanente.
Dr. Constant's NPI, 1457439044, was assigned on November 1, 2006. Dr. Constant graduated from University Of Michigan Medical School in 1990. Dr. Constant holds California license G73408.
NPI and contact details
- NPI
- 1457439044NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1456548049
- NPI enumeration date
- November 1, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (415) 833-2646
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 62
- Medical school graduation
- 1990
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. James S. Constant practices at San Francisco Medical Center in San Francisco, California
Dr. Constant's primary practice is San Francisco Medical Center, at 2425 Geary Blvd, San Francisco, CA 94115 in San Francisco County. The practice phone is (415) 833-2646.
- San Francisco Medical Center2425 Geary Blvd, San Francisco, CA 94115 · San Francisco CountyPhone(415) 833-2646
Source: Dmand AI Affiliation Data
Dr. James S. Constant is affiliated with 2 sites of care and 1 medical group
Dr. Constant's primary practice is San Francisco Medical Center in San Francisco, California, part of Kaiser Permanente. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Constant to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. James S. Constant's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Constant practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| San Francisco Medical Center | 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. James S. Constant is one of 2,926 general surgeons in California
Surgery is Dr. Constant's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Constant is board certified in surgery by the American Board of Surgery. Dr. Constant is licensed in California.
Specialties and state licenses
- Surgery, CaliforniaPrimary
General surgeons near Dr. Constant
Counts of general surgeons with a Dmand AI profile, by place and practice. Each opens the list.
2,926general surgeons in California162general surgeons in San Francisco7general surgeons at San Francisco Medical Center
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. James S. Constant's patients have a median age of 57
Across all payers, Dmand AI patient panel data puts Dr. Constant's median patient age at 57, with 43% women.
Dr. Constant's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 57
Patient panel by sex, all payers
- Women43%
- Men55%
Source: Dmand AI Patient Panel Data
Dr. James S. Constant wrote 17 Medicare Part D claims in 2024
In 2024, Dr. Constant wrote 17 Medicare Part D claims for 14 patients. 82% of them were for generic drugs. CMS names the drug for 16 of them, across 1 drug with 11 or more claims each, at $119 in total drug cost. In 2022, CMS named 13 claims across 1 drug.
Part D claims, 202417
Drugs named by CMS1
Total drug cost$119
Part D patients14
Dr. Constant's Part D claims by kind of drug, 2024
- Generic14 claims82%
- Brand-name and other3 claims18%
Dr. Constant's most prescribed drugs by claims, 2023
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, 2022 to 2023
- 2022
- 2023
- Claims for drugs CMS names
- 2022: 132023: 1623%
Drugs named by CMS: 1 in 2023, 1 in 2022.
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
How Dr. James S. Constant takes part in Medicare
Dr. Constant accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
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Dr. James S. Constant has 1 publication on record
Dmand AI links 1 paper to Dr. Constant. Dr. Constant's most frequent co-author is John Jih Jong Feng, MD.
Papers1
Dr. Constant's most frequent co-authors
Recent publications by Dr. Constant
See who Dr. Constant researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Constant works with, so you can find a warm path to the right general surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. James S. Constant received $750 in industry payments in 2016
CMS Open Payments shows 1 general payment to Dr. Constant from 1 drug or device company in 2016. Education make up the largest share, 100% of the total. Intuitive Surgical, Inc. paid the most, $750.
Companies that paid Dr. Constant the most, 2016 to 2016
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. James S. Constant has 2 awards and honors on record
Dmand AI lists 2 awards for Dr. Constant, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Constant
- 2011
- CMS Stage 1 2012
- Undated
- ACS Fellow
Source: Dmand AI Professional Profile Data
Dr. James S. Constant graduated from University Of Michigan Medical School
Dr. Constant graduated from University Of Michigan Medical School in 1990. Dr. Constant is a member of ACS.
- Medical school
- Board certified in surgery
Source: Dmand AI Professional Profile Data
Dr. James S. Constant accepts plans from 1 insurance carrier
Dr. Constant is in network with 1 carrier, including Kaiser Permanente. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
Plan types Dr. Constant accepts, by number of carriers
- EPO1
- HMO1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. James S. Constant'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) |
| 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) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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. James S. Constant
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. James S. Constant's NPI number?
Dr. James S. Constant's NPI number is 1457439044. It was assigned on November 1, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. James S. Constant?
Dr. James S. Constant is a general surgeon in San Francisco, California. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. James S. Constant practice?
Dr. Constant practices at 2425 Geary Blvd, San Francisco, CA 94115. Dr. Constant's primary practice is San Francisco Medical Center in San Francisco, California, part of Kaiser Permanente. Dmand AI also links Dr. Constant to 1 group practice or clinic.
What is Dr. James S. Constant's office phone number?
The practice phone on file for Dr. Constant is (415) 833-2646.
What is Dr. James S. Constant's medical license number?
Dr. Constant holds California license G73408.
Which hospitals is Dr. James S. Constant affiliated with?
Dr. Constant practices at San Francisco Medical Center in San Francisco, California.
What medical group is Dr. James S. Constant part of?
Dr. Constant is linked to The Permanente Medical Group, Inc.
Does Dr. James S. Constant accept Medicare?
Yes. CMS lists Dr. Constant as accepting Medicare assignment.
Is Dr. James S. Constant board certified?
Yes. Dr. Constant is board certified in surgery by the American Board of Surgery.
Where did Dr. James S. Constant go to medical school?
Dr. Constant graduated from University Of Michigan Medical School in 1990.
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What drugs does Dr. James S. Constant prescribe most?
In 2023 Medicare Part D data, Dr. Constant's most prescribed drugs by claims were Oxycodone HCl.
Has Dr. James S. Constant received payments from drug or device companies?
CMS Open Payments shows $750 in general payments to Dr. Constant from 1 company from 2016 to 2016. The largest total came from Intuitive Surgical, Inc.
How long has Dr. James S. Constant been practicing?
Dr. Constant graduated from medical school in 1990, 36 years ago.
Does Dr. James S. Constant do research?
Dmand AI links 1 publication to Dr. Constant.
Who does Dr. James S. Constant publish with?
Dr. Constant's most frequent co-authors are John Jih Jong Feng, MD (1 shared paper).
What insurance does Dr. James S. Constant accept?
Dr. Constant is in network with 1 carrier, including Kaiser Permanente. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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