Ronald F. Flax, M.D.
Anesthesiology Physician · York, PA
Ronald F. Flax, M.D. is an anesthesiology physician with a practice address in York, Pennsylvania, and NPI 1821099433, issued on Aug 4, 2005. Check the license (Pennsylvania MD474619, as entered in NPPES) on the Pennsylvania Department of State (PALS); the Medicare figures below come from public CMS files.
- Name
- Ronald F. Flax
- Credential
- M.D.
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- MD474619 PA
Self-reported in NPPES; status is on the state search - Practice location
- 1861 Powder Mill RD, York, PA 17402
- Phone
- (717) 718-2000
- Enumerated
- Aug 4, 2005
- Record last updated
- Oct 7, 2025
- Fax
- (717) 718-3460
- Medicare enrollment
- Enrolled (PECOS I20210907001520); accepts Medicare assignment
- Medical or professional school
- Medical College Of Pennsylvania, 1985
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 2,481 in Pennsylvania → Look up another NPI →
Also registered at 1861 Powder Mill RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Madeline Aghazarian, CRNP, FNP-CNurse Practitioner1487241881
- Dustin Axe, CRNACertified Registered Nurse Anesthetist1710413869
- William BakerPharmacist1457762015
- Christian Barotti, MDAnesthesiology Physician1902896061
- Laura BellaOccupational Therapist1588781421
- Brandy Borman, CRNPFamily Nurse Practitioner1790260164
Verify Ronald F. Flax in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersPennsylvania Department of State (PALS)
Search for license MD474619Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 95.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Oss Orthopaedic Hospital LLCYork, PA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ronald F. Flax among 2,481 anesthesiology physician records in Pennsylvania
Ronald F. Flax, M.D. is one of 2,481 anesthesiology physician records with a practice address in Pennsylvania. 76% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 81% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1985 · median 2005 among the 1,720 with a school on file
- Record last updated2025 · 57% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
65 anesthesiology physician records list a practice address in York
They are 65 of the 4,575 NPPES records with a practice address in York, and 2,481 anesthesiology physician records in Pennsylvania.
All 2,481 in Pennsylvania → Every provider in York → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Christian Barotti, MDYork, PA 174021902896061
- Paul Hester, MDYork, PA 174021578553673
- Jean-Max Hogarth, M.D.York, PA 174021477554897
- Brandon Johnson, M. D.York, PA 174021952542656
- Sam Keller, MDYork, PA 174021942463104
- Christopher May, M.D.York, PA 174021477554004
- David Baker, MDYork, PA 174031144212622
- Thomas Bering, MDYork, PA 174031700878477
Common questions
What is Ronald F. Flax, M.D.'s NPI number?
Ronald F. Flax, M.D.'s National Provider Identifier (NPI) is 1821099433, issued on Aug 4, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Ronald F. Flax, M.D. located?
The NPPES record lists a practice address at 1861 Powder Mill RD, York, PA, 17402. Phone: (717) 718-2000. Providers update this record themselves, so call before visiting.
How can I verify Ronald F. Flax, M.D.'s license?
NPPES lists Pennsylvania license number MD474619, as entered by the provider. Search the Pennsylvania Department of State (PALS) at https://www.pals.pa.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Ronald F. Flax, M.D.'s MIPS final score?
The 2023 MIPS final score is 95.2 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.