Mark Lacy, MD
NPI 1134177215 · Infectious Disease Physician · Prescott, AZ
Enrolled with Medicare as Practitioner - Infectious Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Lacy, MD is a Infectious Disease Physician provider in Prescott, AZ (NPI 1134177215).
Provider details
- NPI number
- 1134177215
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 45341 (TX)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
4 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
16 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 16 | $130 |
Typical Medicare-allowed amounts for these services range $130–$130 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 5 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Levothyroxine Sodium | 13 |
| Losartan Potassium | 12 |
| Atorvastatin Calcium | 11 |
| Metformin Hcl | 11 |
| Lisinopril | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (3)
- 430 Windward Way Ste 100Kalispell, MT 59901-2619Phone: (406) 751-5364Fax: (406) 751-5367
- 210 Sunnyview Ln Ste 105Kalispell, MT 59901-3128Phone: (406) 756-4727Fax: (406) 751-5350
- Dept Internal Medicine 1 University Nm Msc 10-5550Albuquerque, NM 87131-0001Phone: (505) 272-1670Fax: (505) 272-4435
Registry dates
- Enumerated
- 2006-05-04
- Last updated
- 2025-08-13
- Certified
- 2025-08-13
Frequently asked questions
- What is Mark Lacy's NPI number?
- Mark Lacy's National Provider Identifier (NPI) is 1134177215, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Lacy's specialty?
- Mark Lacy is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Lacy located?
- Mark Lacy's practice location on file with NPPES is 300 N Lee Blvd, Prescott, AZ 86301-5710.
- What is Mark Lacy's phone number?
- The practice phone number listed in the NPPES registry for Mark Lacy is (928) 708-4603.
- Does Mark Lacy accept Medicare?
- Mark Lacy is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Lacy's NPI active?
- Yes — Mark Lacy's NPI (1134177215) is active in the NPPES registry as of the last update on 2025-08-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.