Mark Folmsbee, D.O.
NPI 1427393123 · General Practice Physician · San Fernando, CA
Enrolled with Medicare as Practitioner - General Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Folmsbee, D.O. is a General Practice Physician provider in San Fernando, CA (NPI 1427393123).
Provider details
- NPI number
- 1427393123
- Entity type
- Individual
- Primary specialty
- General Practice PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 14847 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
13 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
2 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 · 54 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 144 | 69 |
| Lisinopril | 111 | 58 |
| Amlodipine Besylate | 107 | 46 |
| Levothyroxine Sodium | 99 | 41 |
| Losartan Potassium | 90 | 33 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 66 | 30 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$14 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (1)
- 13455 Snowdrop CtVictorville, CA 92394-9583Phone: (334) 434-2031
Registry dates
- Enumerated
- 2012-12-06
- Last updated
- 2020-10-27
- Certified
- 2020-10-27
Frequently asked questions
- What is Mark Folmsbee's NPI number?
- Mark Folmsbee's National Provider Identifier (NPI) is 1427393123, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Folmsbee's specialty?
- Mark Folmsbee is listed in the NPPES registry with a primary specialty of General Practice Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Folmsbee located?
- Mark Folmsbee's practice location on file with NPPES is 732 Mott St Ste 100-110, San Fernando, CA 91340-4237.
- What is Mark Folmsbee's phone number?
- The practice phone number listed in the NPPES registry for Mark Folmsbee is (818) 963-5690.
- Does Mark Folmsbee accept Medicare?
- Mark Folmsbee is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Folmsbee's NPI active?
- Yes — Mark Folmsbee's NPI (1427393123) is active in the NPPES registry as of the last update on 2020-10-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.