Angel J. Diaz Martinez, MD

Medicare activity in 2024

Official CMS public-use data for Angel J. Diaz Martinez, 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.

Most frequent services

1. Destruction of precancer skin growth, 2-14 growths (17003)1,287 services
2. Destruction of skin growth, 1-14 growths (17110)479 services
3. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)435 services
4. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)430 services
5. Destruction of precancer skin growth, 1 growth (17000)417 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 cholesterol74%
• High blood pressure71%
• Arthritis42%
• Anxiety29%
• Chronic kidney disease27%
• Diabetes25%

Hospitals where Angel J. Diaz Martinez works

Medicare's Facility Affiliation Data lists Angel J. Diaz Martinez 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.

• Winchester HospitalWinchester, MA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 220105

Practice locations

Addresses where Angel J. Diaz Martinez is enrolled with Medicare (CMS data updated October 2, 2026).

• 92 Montvale Ave, Suite 3000Stoneham, MA 02180 (781) 438‑6350

Group practices

Medicare enrollment lists Angel J. Diaz Martinez as a member of this group (CMS data updated October 2, 2026).

• Mystic Valley Dermatology Associates PC11 clinicians in the group

Specialties

• Dermatologyprimary

Find other Dermatology doctors in Massachusetts →

Other dermatologists in Stoneham

Clinicians with the same Medicare primary specialty in Stoneham, MA — not a recommendation.

• Aimee L. Leonard, MD
• Oluwatobi Ogbechie-Godec, MD
• John M. Tomich, MD

All dermatologists in Stoneham →

Other clinicians in Mystic Valley Dermatology Associates PC

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

• Neha Parmar, NP
• Kristin L. Mannke, NP
• Aimee L. Leonard, MD
• Oluwatobi Ogbechie-Godec, MD
• Mary E. Awad, MD
• Louisa E. Codier, NP

Clinician information

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