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

Internal Medicine

Elizabeth G. Tseytlin, DO

Works at hospitals in Manchester, NH · New Hampshire

Summary

Dr. Elizabeth G. Tseytlin, DO is an internal medicine doctor at 275 Mammoth Rd, Manchester, NH 03109. Phone: (603) 663-8200. Accepts Medicare assignment. In 2024, Elizabeth G. Tseytlin had 77 Original Medicare patients and 192 services. NPI 1427404177. 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: 275 Mammoth Rd, Manchester, NH 03109 · Directions (1 more location)
  • Phone: (603) 663‑8200
  • Medicare: Accepts Medicare assignment
  • Hospitals: Catholic Medical Center, Elliot Hospital
  • Group practice: Elliot Physicians Network
  • Medical school: graduated 2016 (10 years since medical school)
  • Gender (as listed): Female
  • Telehealth: offered

From official Medicare data

This page shows what Medicare's official clinician data says about Elizabeth G. Tseytlin, 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 Elizabeth G. Tseytlin accept Medicare assignment?
Yes. Medicare's clinician data says Elizabeth G. Tseytlin accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
How many Medicare patients does Elizabeth G. Tseytlin see?
In 2024, CMS data shows 77 Original Medicare patients and 192 services for Elizabeth G. Tseytlin. This counts Original Medicare only and measures volume, not quality.
What is Elizabeth G. Tseytlin's NPI number?
1427404177. 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 Elizabeth G. Tseytlin, 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 patients77
Services billed to Medicare192
Different services or procedures13
Participating Medicare providerYes
Average age of these patients70

Most frequent services

  1. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)139 services
  2. New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)13 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 cholesterol69%
  • High blood pressure52%
  • Arthritis38%
  • Anxiety35%
  • Depression26%
  • Asthma22%

Hospitals where Elizabeth G. Tseytlin works

Medicare's Facility Affiliation Data lists Elizabeth G. Tseytlin 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.

  • Catholic Medical CenterManchester, NH · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 300034
  • Elliot HospitalManchester, NH · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 300012

Practice locations

Addresses where Elizabeth G. Tseytlin is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Elizabeth G. Tseytlin as a member of this group (CMS data updated October 2, 2026).

  • Elliot Physicians Network77 clinicians in the group

Specialties

Find other Internal Medicine doctors in New Hampshire →

Other internal medicine doctors in Manchester

Clinicians with the same Medicare primary specialty in Manchester, NH — not a recommendation.

All internal medicine doctors in Manchester →

Other clinicians in Elliot Physicians Network

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

Clinician information

CredentialDO
Graduation year2016 (10 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1427404177
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