John Robert Mark, MD
Student in an Organized Health Care Education/Training Program · Sacramento, CA
John Robert Mark, MD is a student in an organized health care education/training program with a practice address in Sacramento, California, and NPI 1720692775, issued on Sep 6, 2020. Check the license with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- John Robert Mark
- Credential
- MD
- Primary taxonomy
- Student in an Organized Health Care Education/Training Program 390200000X
- Practice location
- 4860 Y St Ste 2400, Sacramento, CA 95817
- Phone
- (916) 734-6602
- Enumerated
- Sep 6, 2020
- Record last updated
- Apr 1, 2022
- Entity
- Type 1 · individual
8 nearest student in an organized health care education/training program records → All 40,652 in California → Look up another NPI →
Also registered at 4860 Y St Ste 2400
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John Robert Mark in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this professionCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
9% more Medicare Part D claims than the average student in an organized health care education/training program in 2024
202 Medicare Part D claims for 73 beneficiaries, against an average of 185 among the 59,748 providers of this specialty who prescribed in Part D. Brand-name drugs were 58% of claims.
Most prescribed
- Latanoprost64 claims
- Restasis14 claims
- Prednisolone Acetate13 claims
- Doxycycline Hyclate12 claims
- Timolol Maleate12 claims
- Dorzolamide-Timolol11 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.
Industry payments in 2024: $142.05
3 payments; by number, the most common kind was food and beverage; the largest payer was Alcon Vision LLC. The 13,278 providers of this specialty with any payment received $608.08 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.
John Robert Mark among 40,652 student in an organized health care education/training program records in California
John Robert Mark, MD is one of 40,652 student in an organized health care education/training program records with a practice address in California. 16% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 24% of them.
- NPI issued2020 · 24% of these records are older, 72% newer
- In a Medicare fileYes · 16% of these records are
- In the CMS Doctors and Clinicians fileNo · 6% of these records are
- Record last updated2022 · 26% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 390200000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
2,087 student in an organized health care education/training program records list a practice address in Sacramento
They are 2,087 of the 33,083 NPPES records with a practice address in Sacramento, and 40,652 student in an organized health care education/training program records in California.
All 40,652 in California → Every provider in Sacramento → Student in an Organized Health Care Education/Training Program nationwide →
The 8 student in an organized health care education/training program records with the nearest ZIP codes
- Sharon Chang, M.D.Sacramento, CA 958171093797201
- Kimberly DavisSacramento, CA 958171841483864
- Steven Elliott, M.D.Sacramento, CA 958171215918750
- Genevieve Garratt, PH.D.Sacramento, CA 958171730376815
- David Konczal, M.D.Sacramento, CA 958171225204043
- Jacqueline Letran, M.D.Sacramento, CA 958171669648499
- Adrian Palomino, M.D.Sacramento, CA 958171023205747
- Colin Parsons, M.D.Sacramento, CA 958171629059977
Common questions
What is John Robert Mark, MD's NPI number?
John Robert Mark, MD's National Provider Identifier (NPI) is 1720692775, issued on Sep 6, 2020. An NPI identifies a provider in billing; it is not a license.
Where is John Robert Mark, MD located?
The NPPES record lists a practice address at 4860 Y St Ste 2400, Sacramento, CA, 95817. Phone: (916) 734-6602. Providers update this record themselves, so call before visiting.
How can I verify John Robert Mark, MD's license?
Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does John Robert Mark, MD prescribe under Medicare Part D?
In 2024, John Robert Mark, MD had 202 Medicare Part D claims for 73 beneficiaries; the average among student in an organized health care education/training program prescribers was 185. Part D covers Medicare prescriptions only.
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.