Nathan Daniel Mark, D.O.
Anesthesiology Physician · Hartford, CT
Nathan Daniel Mark, D.O. is an anesthesiology physician with a practice address in Hartford, Connecticut, and NPI 1902973993, issued on Nov 29, 2006. Check the license (Connecticut 050791, as entered in NPPES) on the Connecticut Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Nathan Daniel Mark
- Credential
- D.O.
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License numbers
- 050791 CT
CDRH.0057872 CO
Self-reported in NPPES; status is on the state search - Practice location
- 80 Seymour St, Hartford, CT 06106
- Phone
- (860) 545-2117
- Enumerated
- Nov 29, 2006
- Record last updated
- Oct 3, 2024
- Medicare enrollment
- Enrolled (PECOS I20170328000771); accepts Medicare assignment
- Medical or professional school
- New York College Of Osteo Medicine Of New York Institute Of Technology, 2005
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 797 in Connecticut → Look up another NPI →
Also registered at 80 Seymour St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Sherry Adams, RN, MSN, BSN, CDCESDiabetes Educator Registered Nurse1821862905
- Eleanor Adzamli-Wefum, PA-CMedical Physician Assistant1023820404
- Neha Agrawal, MDAnesthesiology Physician1760973630
- Ahmad Al Nawaiseh, MDCardiovascular Disease Physician1780318543
- Yasser Al-Baghdadi, M.D.Anesthesiology Physician1023045184
- Francis Aldo, D.O.Anesthesiology Physician1912185844
Verify Nathan Daniel Mark in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersConnecticut Medical Examining Board
Search for license 050791Check 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): 81 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
- Catholic Health Initiatives ColoradoDurango, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nathan Daniel Mark among 797 anesthesiology physician records in Connecticut
Nathan Daniel Mark, D.O. is one of 797 anesthesiology physician records with a practice address in Connecticut. 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 2006, is newer than 17% of them.
- NPI issued2006 · 17% of these records are older, 54% newer
- In a Medicare fileYes · 76% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated2005 · median 2006 among the 550 with a school on file
- Record last updated2024 · 61% 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 Connecticut practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
114 anesthesiology physician records list a practice address in Hartford
They are 114 of the 6,317 NPPES records with a practice address in Hartford, and 797 anesthesiology physician records in Connecticut.
All 797 in Connecticut → Every provider in Hartford → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Yasser Al-Baghdadi, M.D.Hartford, CT 061061023045184
- Francis Aldo, D.O.Hartford, CT 061061912185844
- Michael Archambault, M.D.Hartford, CT 061061689865743
- Evan Burke, M.D.Hartford, CT 061061164696886
- Edward Cortland, M.D.Hartford, CT 061061871575670
- Adam Debin, D.O.Hartford, CT 061061124016530
- Howard Gutstein, M.D.Hartford, CT 061061255424180
- Jan Hackman, MDHartford, CT 061061528048329
Common questions
What is Nathan Daniel Mark, D.O.'s NPI number?
Nathan Daniel Mark, D.O.'s National Provider Identifier (NPI) is 1902973993, issued on Nov 29, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Nathan Daniel Mark, D.O. located?
The NPPES record lists a practice address at 80 Seymour St, Hartford, CT, 06106. Phone: (860) 545-2117. Providers update this record themselves, so call before visiting.
How can I verify Nathan Daniel Mark, D.O.'s license?
NPPES lists Connecticut license number 050791, as entered by the provider. Search the Connecticut Medical Examining Board at https://www.elicense.ct.gov/Lookup/LicenseLookup.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Nathan Daniel Mark, D.O.'s MIPS final score?
The 2023 MIPS final score is 81 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.