Medical emergency?Emergency? Call 911. Nearest emergency roomsNearest ERs

Internal Medicine

Clifford D. Stirba, MD

Works at hospitals in Norwich, CT · Connecticut

Summary

Dr. Clifford D. Stirba, MD is an internal medicine doctor at 326 Washington St, Norwich, CT 06360. Phone: (860) 889-8331. May accept Medicare assignment. In 2024, Clifford D. Stirba had 51 Original Medicare patients and 225 services. NPI 1801897665. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Internal medicine doctor (Medicare lists Internal Medicine)
  • Address: 326 Washington St, Norwich, CT 06360 · Directions (1 more location)
  • Phone: (860) 889‑8331
  • Medicare: May accept Medicare assignment
  • Hospital: William W Backus Hospital
  • Group practice: The William W Backus Hospital
  • Medical school: Perelman School Of Med At The University Of Pennsylvania · graduated 1971 (55 years since medical school)
  • Gender (as listed): Male
  • Telehealth: offered

From official Medicare data

This page shows what Medicare's official clinician data says about Clifford D. Stirba, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Clifford D. Stirba accept Medicare assignment?
Medicare's clinician data says Clifford D. Stirba may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
How many Medicare patients does Clifford D. Stirba see?
In 2024, CMS data shows 51 Original Medicare patients and 225 services for Clifford D. Stirba. This counts Original Medicare only and measures volume, not quality.
What is Clifford D. Stirba's NPI number?
1801897665. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.

Medicare activity in 2024

Official CMS public-use data for Clifford D. Stirba, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.

Original Medicare patients51
Services billed to Medicare225
Different services or procedures11
Participating Medicare providerYes
Average age of these patients69

Most frequent services

  1. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)49 services
  2. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)28 services

Chronic conditions among these patients

Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).

  • High blood pressure75%
  • High cholesterol75%
  • Diabetes39%
  • Arthritis39%
  • Anxiety39%
  • COPD39%

Hospitals where Clifford D. Stirba works

Medicare's Facility Affiliation Data lists Clifford D. Stirba at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

  • William W Backus HospitalNorwich, CT · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 070024

Practice locations

Addresses where Clifford D. Stirba is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Clifford D. Stirba as a member of this group (CMS data updated October 2, 2026).

  • The William W Backus Hospital249 clinicians in the group

Specialties

Find other Internal Medicine doctors in Connecticut →

Other internal medicine doctors in Norwich

Clinicians with the same Medicare primary specialty in Norwich, CT — not a recommendation.

All internal medicine doctors in Norwich →

Other clinicians in The William W Backus Hospital

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Medical schoolPerelman School Of Med At The University Of Pennsylvania
Graduation year1971 (55 years since medical school)
Gender (as listed)Male
Medicare assignmentMay accept for some services
TelehealthOffers telehealth services
NPI (National Provider Identifier)1801897665
CorrectionsReport an error or suggest an update →

Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.

Sources

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians