Katherine Loomis, MD
NPI 1255835989 · Internal Medicine Physician · Los Angeles, CA
Katherine Loomis, MD is a Internal Medicine Physician provider in Los Angeles, CA (NPI 1255835989).
Provider details
- NPI number
- 1255835989
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
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 tenure33% of score
8 yrs in NPPES registry
- Profile completeness33% of score
83% 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 · 6 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Amlodipine Besylate | 21 |
| Metformin Hcl | 17 |
| Bictegrav/Emtricit/Tenofov Alabrand: Biktarvy | 14 |
| Atorvastatin Calcium | 13 |
| Benazepril Hcl | 12 |
| Empagliflozinbrand: Jardiance | 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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$98 across 4 records (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)
- 1200 N State St.Clinic Tower, Suite A7dLos Angeles, CA 90033-1029Phone: (626) 318-0152
Registry dates
- Enumerated
- 2018-03-19
- Last updated
- 2022-07-14
- Certified
- 2022-07-14
Frequently asked questions
- What is Katherine Loomis's NPI number?
- Katherine Loomis's National Provider Identifier (NPI) is 1255835989, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine Loomis's specialty?
- Katherine Loomis is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Katherine Loomis located?
- Katherine Loomis's practice location on file with NPPES is 10833 Le Conte Ave # Chs37121, Los Angeles, CA 90095-1029.
- What is Katherine Loomis's phone number?
- The practice phone number listed in the NPPES registry for Katherine Loomis is (626) 318-0152.
- Is Katherine Loomis's NPI active?
- Yes — Katherine Loomis's NPI (1255835989) is active in the NPPES registry as of the last update on 2022-07-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.