Matthew G. Houlahan, MD

Medicare activity in 2024

Official CMS public-use data for Matthew G. Houlahan, 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. Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)256 services
2. Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)238 services
3. Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (G0439)109 services
4. Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more (99215)24 services
5. Administration of influenza virus vaccine (G0008)23 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 pressure50%
• High cholesterol50%
• Arthritis34%
• Ischemic heart disease20%
• Diabetes19%
• Depression17%

Hospitals where Matthew G. Houlahan works

Medicare's Facility Affiliation Data lists Matthew G. Houlahan 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.

• Dominican HospitalSanta Cruz, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050242

Practice locations

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

• 1301 Mission StSanta Cruz, CA 95060 (831) 458‑6300
• 2025 Soquel AveSanta Cruez, CA 95062 (831) 423‑4111
• 550 S Green Valley RdWatsonville, CA 95076 (831) 458‑5865
• 795 El Camino RealPalo Alto, CA 94301 (415) 600‑1020

Group practices

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

• Sutter Bay Medical Foundation3,829 clinicians in the group

Specialties

• Family Practiceprimary

Find other Family Practice doctors in California →

Other family doctors in Santa Cruz

Clinicians with the same Medicare primary specialty in Santa Cruz, CA — not a recommendation.

• Jackson C. Nagle, DO
• Cassy Friedrich, MD
• Robert J. Weber, MD
• Joseph M. Molinaro, DO
• Nicholas Hanna, DO
• John D. Bergren, MD
• Gael F. Decleve, DO
• Karissa L. Leclair, MD

All family doctors in Santa Cruz →

Other clinicians in Sutter Bay Medical Foundation

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

• Timothy Davern, MD
• Thomas E. Quigg, DO
• Liat M. Litwin, MD
• John M. Rabkin, MD
• David J. Kang, DO
• Wilson Kee

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