Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Nathan E. Riddell, MD

Individual provider Cardiovascular Disease Physician · NPI 1245670983

Nathan E. Riddell, MD is an Internal Medicine in Worcester, Massachusetts. Qualified in 2013, 13 years ago. Practices with Tvcg Ste PLLC, a 7-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in Massachusetts.

Years since qualifying
13
Licensed in
MA
In the registry since
2013
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

55 Lake Ave N
Worcester, MA 01655-0002
Phone: (508) 334-1000
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 1115 Westford St Ste 2, Lowell, MA 01851-2853 — (351) 221-7080

Specialties & licences

Cardiovascular Disease Physician (primary) Taxonomy 207RC0000X · Licence 273386 (MA)
Internal Medicine Physician Taxonomy 207R00000X · Licence 256554 (MA)

Record details

NPI number1245670983
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 26, 2013
Last updated in NPPESDecember 8, 2025
Certification dateDecember 8, 2025
Mailing address55 Lake Ave N, Worcester, MA 01655-0002

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyINTERNAL MEDICINE
Also practisesCARDIOVASCULAR DISEASE (CARDIOLOGY)
Medical schoolOTHER
Graduated 2013 (13 years in practice)
Group practice Tvcg Ste Pllc — 7 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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