Mark A. Tidswell, MD
Critical Care Medicine (Internal Medicine) Physician · Springfield, MA
Mark A. Tidswell, MD is a critical care medicine (internal medicine) physician with a practice address in Springfield, Massachusetts, and NPI 1699722066, issued on May 30, 2006. Check the license (Massachusetts 161219, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Mark A. Tidswell
- Credential
- MD
- Primary taxonomy
- Critical Care Medicine (Internal Medicine) Physician 207RC0200X
- License number
- 161219 MA
Self-reported in NPPES; status is on the state search - Practice location
- 759 Chestnut Street, Springfield, MA 01199
- Phone
- (413) 794-5439
- Enumerated
- May 30, 2006
- Record last updated
- Apr 1, 2011 (not updated in 15 years: call before relying on the address or phone)
- Fax
- (413) 794-5389
- Medicare enrollment
- Enrolled (PECOS I20100105000647); accepts Medicare assignment
- Medical or professional school
- Oregon Health Sciences University School Of Medicine, 1987
- Entity
- Type 1 · individual
8 nearest critical care medicine (internal medicine) physician records → All 157 in Massachusetts → Look up another NPI →
Also registered at 759 Chestnut Street
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Aroosa Alam, MDHospitalist Physician1700023827
- Sandra Bellantonio, MDGeriatric Medicine (Internal Medicine) Physician1437245206
- Christine Bryson, DOHospitalist Physician1609851914
- Gavin Budhram, MDEmergency Medicine Physician1851596134
- Matthew Collins, MDStudent in an Organized Health Care Education/Training Program1922484476
- Heidi-Ann Courtney, PAMedical Physician Assistant1750316873
Verify Mark A. Tidswell in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 161219Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $159.44
2 payments; by number, the most common kind was food and beverage; the largest payer was Novartis Pharmaceuticals Corporation. The 2,708 providers of this specialty with any payment received $2,958.68 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.
Bills Medicare through one group practice
- Baystate Medical Practices IncSpringfield, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark A. Tidswell among 157 critical care medicine (internal medicine) physician records in Massachusetts
Mark A. Tidswell, MD is one of 157 critical care medicine (internal medicine) physician records with a practice address in Massachusetts. 78% 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 13% of them.
- NPI issued2006 · 13% of these records are older, 56% newer
- In a Medicare fileYes · 78% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated1987 · median 2005 among the 116 with a school on file
- Record last updated2011 · 39% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RC0200X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Critical Care Medicine (Internal Medicine) Physician providers in Massachusetts
There are 157 critical care medicine (internal medicine) physician records in Massachusetts.
All 157 in Massachusetts → Every provider in Springfield → Critical Care Medicine (Internal Medicine) Physician nationwide →
The 8 critical care medicine (internal medicine) physician records with the nearest ZIP codes
- Thomas Higgins, MDSpringfield, MA 011991689788499
- Tara Humphrey, D.O.Springfield, MA 011991417295148
- Oksana Kagan, PASpringfield, MA 011991124953435
- James Ligas, M.D.Springfield, MA 011991336145556
- Morva Mansoury, MDSpringfield, MA 011991568111276
- William McGee, MDSpringfield, MA 011991649384488
- Peters Okonoboh, MDSpringfield, MA 011991215166020
- Abigail Orenstein, MDSpringfield, MA 011991700834751
Common questions
What is Mark A. Tidswell, MD's NPI number?
Mark A. Tidswell, MD's National Provider Identifier (NPI) is 1699722066, issued on May 30, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mark A. Tidswell, MD located?
The NPPES record lists a practice address at 759 Chestnut Street, Springfield, MA, 01199. Phone: (413) 794-5439. Providers update this record themselves, so call before visiting.
How can I verify Mark A. Tidswell, MD's license?
NPPES lists Massachusetts license number 161219, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. 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.