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Rheumatology

Douglas F. Marks Jr., MD

Works at hospitals in Manchester, NH · New Hampshire

Summary

Dr. Douglas F. Marks Jr., MD is a rheumatologist at 1 Elliot Way, Manchester, NH 03103. Phone: (603) 627-1669. Accepts Medicare assignment. In 2024, Douglas F. Marks Jr. had 388 Original Medicare patients and 1,465 services. NPI 1013924240. 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: Rheumatologist (Medicare lists Rheumatology)
  • Address: 1 Elliot Way, Manchester, NH 03103 · Directions (2 more locations)
  • Phone: (603) 627‑1669
  • Medicare: Accepts Medicare assignment
  • Hospital: Elliot Hospital
  • Group practice: Elliot Professional Services
  • Medical school: University Of Massachusetts Medical School · graduated 2001 (25 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 Douglas F. Marks Jr., 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 Douglas F. Marks Jr. accept Medicare assignment?
Yes. Medicare's clinician data says Douglas F. Marks Jr. 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 Douglas F. Marks Jr. see?
In 2024, CMS data shows 388 Original Medicare patients and 1,465 services for Douglas F. Marks Jr.. This counts Original Medicare only and measures volume, not quality.
What is Douglas F. Marks Jr.'s NPI number?
1013924240. 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 Douglas F. Marks Jr., 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 patients388
Services billed to Medicare1,465
Different services or procedures15
Participating Medicare providerYes
Average age of these patients75

Most frequent services

  1. Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)613 services
  2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)558 services
  3. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)91 services
  4. New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more (99205)76 services
  5. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)42 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 cholesterol75%
  • Arthritis75%
  • High blood pressure64%
  • Osteoporosis51%
  • Anxiety23%
  • Depression22%

Hospitals where Douglas F. Marks Jr. works

Medicare's Facility Affiliation Data lists Douglas F. Marks Jr. 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.

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

Practice locations

Addresses where Douglas F. Marks Jr. is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Douglas F. Marks Jr. as a member of this group (CMS data updated October 2, 2026).

  • Elliot Professional Services427 clinicians in the group

Specialties

Find other Rheumatology doctors in New Hampshire →

Other rheumatologists in Manchester

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

All rheumatologists in Manchester →

Other clinicians in Elliot Professional Services

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

Clinician information

CredentialMD
Medical schoolUniversity Of Massachusetts Medical School
Graduation year2001 (25 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
TelehealthOffers telehealth services
NPI (National Provider Identifier)1013924240
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