Marc Lorenz Montecillo, M.D.
NPI 1326305962 · Internal Medicine Physician · Lancaster, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marc Lorenz Montecillo, M.D. is a Internal Medicine Physician provider in Lancaster, CA (NPI 1326305962).
Provider details
- NPI number
- 1326305962
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
14 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 101 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 818 | 328 |
| Amlodipine Besylate | 378 | 157 |
| Lisinopril | 352 | 149 |
| Losartan Potassium | 297 | 118 |
| Levothyroxine Sodium | 220 | 95 |
| Metformin Hcl | 215 | 83 |
| Metformin Hcl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-04-20
- Last updated
- 2021-10-26
- Certified
- 2021-10-26
Frequently asked questions
- What is Marc Lorenz Montecillo's NPI number?
- Marc Lorenz Montecillo's National Provider Identifier (NPI) is 1326305962, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marc Lorenz Montecillo's specialty?
- Marc Lorenz Montecillo is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Marc Lorenz Montecillo located?
- Marc Lorenz Montecillo's practice location on file with NPPES is 43112 15th St W, Lancaster, CA 93534-6219.
- What is Marc Lorenz Montecillo's phone number?
- The practice phone number listed in the NPPES registry for Marc Lorenz Montecillo is (661) 723-2442.
- Does Marc Lorenz Montecillo accept Medicare?
- Marc Lorenz Montecillo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marc Lorenz Montecillo's NPI active?
- Yes — Marc Lorenz Montecillo's NPI (1326305962) is active in the NPPES registry as of the last update on 2021-10-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.