Stephen C. Machnicki, MD
Diagnostic Radiology Physician · New York, NY
Stephen C. Machnicki, MD is a diagnostic radiology physician with a practice address in New York, New York, and NPI 1881778827, issued on Oct 25, 2006. Check the license (New York 200824, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Stephen C. Machnicki
- Credential
- MD
- Primary taxonomy
- Diagnostic Radiology Physician 2085R0202X
- License number
- 200824 NY
Self-reported in NPPES; status is on the state search - Practice location
- 100 E 77TH St, New York, NY 10021
- Phone
- (212) 434-2685
- Enumerated
- Oct 25, 2006
- Record last updated
- Dec 30, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (212) 434-2253
- Medicaid IDs
- 01952583 NY
8677808 NJ - Medicare enrollment
- Enrolled (PECOS I20040719001624); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest diagnostic radiology physician records → All 3,146 in New York → Look up another NPI →
Also registered at 100 E 77TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Stephen C. Machnicki in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 200824Check 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 MIPS final score for 2023 (Medicare payment program): 91.3 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 4 group practices
- Delaware Radiology Associates PAWeston, CT
- Lenox Hill Radiology And Medical Imaging Associates PCWeston, CT
- North Shore-Lij Medical PCNew York, NY
- Southside Faculty Medical Affiliates University Faculty Practice CorpRego Park, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Stephen C. Machnicki among 3,146 diagnostic radiology physician records in New York
Stephen C. Machnicki, MD is one of 3,146 diagnostic radiology physician records with a practice address in New York. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 15% of them.
- NPI issued2006 · 15% of these records are older, 45% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1994 · median 2002 among the 2,169 with a school on file
- Record last updated2010 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2085R0202X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
950 diagnostic radiology physician records list a practice address in New York
They are 950 of the 98,468 NPPES records with a practice address in New York, and 3,146 diagnostic radiology physician records in New York.
All 3,146 in New York → Every provider in New York → Diagnostic Radiology Physician nationwide →
The 8 diagnostic radiology physician records with the nearest ZIP codes
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- James Brady, M.D.New York, NY 100211710983010
- Douglas Decorato, M.D.New York, NY 100211588667877
- Carmel Donovan, MDNew York, NY 100211902806946
- Richard Herzog, M.D.New York, NY 100211548263338
- Richard Katz, M.D.New York, NY 100211376546630
- William Louie, MDNew York, NY 100211336141183
Common questions
What is Stephen C. Machnicki, MD's NPI number?
Stephen C. Machnicki, MD's National Provider Identifier (NPI) is 1881778827, issued on Oct 25, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Stephen C. Machnicki, MD located?
The NPPES record lists a practice address at 100 E 77TH St, New York, NY, 10021. Phone: (212) 434-2685. Providers update this record themselves, so call before visiting.
How can I verify Stephen C. Machnicki, MD's license?
NPPES lists New York license number 200824, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Stephen C. Machnicki, MD's MIPS final score?
The 2023 MIPS final score is 91.3 of 100. 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.