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General Practice

Nicholaus B. Martin, MD

Sees patients in Tucson, AZ · Arizona

Summary

Dr. Nicholaus B. Martin, MD is a general practitioner at 4600 S Park Ave, Suite 5, Tucson, AZ 85714. Phone: (520) 889-9574. Accepts Medicare assignment. In 2024, Nicholaus B. Martin had 22 Original Medicare patients and 54 services. NPI 1629053236. Source: CMS National Downloadable File, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: General practitioner (Medicare lists General Practice)
  • Address: 4600 S Park Ave, Suite 5, Tucson, AZ 85714 · Directions
  • Phone: (520) 889‑9574
  • Medicare: Accepts Medicare assignment
  • Group practice: American Current Care of Arizona PA
  • Medical school: University Of Arizona College Of Medicine · graduated 1983 (43 years since medical school)
  • Gender (as listed): Male

From official Medicare data

This page shows what Medicare's official clinician data says about Nicholaus B. Martin, 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 Nicholaus B. Martin accept Medicare assignment?
Yes. Medicare's clinician data says Nicholaus B. Martin 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 Nicholaus B. Martin see?
In 2024, CMS data shows 22 Original Medicare patients and 54 services for Nicholaus B. Martin. This counts Original Medicare only and measures volume, not quality.
What is Nicholaus B. Martin's NPI number?
1629053236. 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 Nicholaus B. Martin, 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 patients22
Services billed to Medicare54
Different services or procedures15
Participating Medicare providerYes
Average age of these patients74

Most frequent services

  1. New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more (99203)12 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 cholesterol73%
  • Arthritis55%

Practice locations

Addresses where Nicholaus B. Martin is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Nicholaus B. Martin as a member of this group (CMS data updated October 2, 2026).

  • American Current Care of Arizona PA20 clinicians in the group

Specialties

Find other General Practice doctors in Arizona →

Other general practitioners in Tucson

Clinicians with the same Medicare primary specialty in Tucson, AZ — not a recommendation.

All general practitioners in Tucson →

Other clinicians in American Current Care of Arizona PA

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

Clinician information

CredentialMD
Medical schoolUniversity Of Arizona College Of Medicine
Graduation year1983 (43 years since medical school)
Gender (as listed)Male
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1629053236
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. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  2. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  3. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  4. Medicare Care Compare — official Medicare tool to look up clinicians