John Eric Demko, M.D.
Nephrology Physician · San Francisco, CA
John Eric Demko, M.D. is a nephrology physician with a practice address in San Francisco, California, and NPI 1710419338, issued on Apr 2, 2017. Check the license (California A161777, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Eric Demko
- Credential
- M.D.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- A161777 CA
Self-reported in NPPES; status is on the state search - Practice location
- 505 Parnassus Ave, San Francisco, CA 94143
- Phone
- (484) 269-8669
- Enumerated
- Apr 2, 2017
- Record last updated
- Jul 5, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20250630000148); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 1,468 in California → Look up another NPI →
Also registered at 505 Parnassus Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Alexander Aabedi, MDStudent in an Organized Health Care Education/Training Program1245971480
- Kathryn Aaronson, RN, CPNPPediatric Nurse Practitioner1992030951
- Sharon AbadaStudent in an Organized Health Care Education/Training Program1003492844
- Abul Abbas, MBBSAnatomic Pathology Physician1881652964
- Jesse Abelson, MDInternal Medicine Physician1083843817
- Rhonald AbitonaAcute Care Nurse Practitioner1164993473
Verify John Eric Demko in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A161777Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- University OF Penn - Medical GroupPhiladelphia, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Eric Demko among 1,468 nephrology physician records in California
John Eric Demko, M.D. is one of 1,468 nephrology physician records with a practice address in California. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2017, is newer than 91% of them.
- NPI issued2017 · 91% of these records are older, 7% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated2017 · median 2001 among the 1,128 with a school on file
- Record last updated2021 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in California
There are 1,468 nephrology physician records in California.
All 1,468 in California → Every provider in San Francisco → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Amarpali Brar, M.DSan Francisco, CA 941431104001718
- Teresa Chen, M.D.San Francisco, CA 941431336352558
- Kerry Cho, M.D.San Francisco, CA 941431861434318
- Cynthia Delgado, M.D.San Francisco, CA 941431821289323
- Denis Glenn, MDSan Francisco, CA 941431053492199
- Chi-Yuan Hsu, MDSan Francisco, CA 941431578528295
- Raymond Hsu, M.D.San Francisco, CA 941431124139167
- Steven Kim, MDSan Francisco, CA 941431962677294
Common questions
What is John Eric Demko, M.D.'s NPI number?
John Eric Demko, M.D.'s National Provider Identifier (NPI) is 1710419338, issued on Apr 2, 2017. An NPI identifies a provider in billing; it is not a license.
Where is John Eric Demko, M.D. located?
The NPPES record lists a practice address at 505 Parnassus Ave, San Francisco, CA, 94143. Phone: (484) 269-8669. Providers update this record themselves, so call before visiting.
How can I verify John Eric Demko, M.D.'s license?
NPPES lists California license number A161777, 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.
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.