Katherine Keller, DO
NPI 1568854404 · Specialist · Portland, ME
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katherine Keller, DO is a Specialist provider in Portland, ME (NPI 1568854404).
Provider details
- NPI number
- 1568854404
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- DO
- Sex
- Female
- Sole proprietor
- No
- License
- TP17026 (ME)
Specialties & taxonomies
Other Service Providers
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
11 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
1,295 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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 192 | $9 |
| Blood Test, Comprehensive Group of Blood Chemicals80053 | 158 | $10 |
| Complete Blood Cell Count (red Cells, White Blood Cell, Platelets), Automated Test and Automated Differential White Blood Cell Count85025 | 150 | $7 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 147 | $125 |
| Measurement C-Reactive Protein for Detection of Infection Or Inflammation86140 | 109 | $5 |
| Red Blood Cell Sedimentation Rate, to Detect Inflammation, Non-Automated85651 | 107 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 18 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 159 | 55 |
| Methotrexate Sodiumbrand: Methotrexate | 100 | 36 |
| Hydroxychloroquine Sulfate | 93 | 34 |
| Alendronate Sodium | 32 | 13 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 26 | 15 |
| Tofacitinib Citratebrand: Xeljanz | 24 | — |
Practice location
Mailing address
Additional practice locations (2)
- 740 S. Limestone, Room J515Lexington, KY 40536Phone: (859) 323-5921
- 22 Bramhall StPortland, ME 04102-3134Phone: (207) 662-0001
Registry dates
- Enumerated
- 2015-03-02
- Last updated
- 2021-01-20
- Certified
- 2021-01-20
Frequently asked questions
- What is Katherine Keller's NPI number?
- Katherine Keller's National Provider Identifier (NPI) is 1568854404, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine Keller's specialty?
- Katherine Keller is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Katherine Keller located?
- Katherine Keller's practice location on file with NPPES is 51 Sewall St Ste 1, Portland, ME 04102-2697.
- What is Katherine Keller's phone number?
- The practice phone number listed in the NPPES registry for Katherine Keller is (207) 774-5761.
- Does Katherine Keller accept Medicare?
- Katherine Keller is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katherine Keller's NPI active?
- Yes — Katherine Keller's NPI (1568854404) is active in the NPPES registry as of the last update on 2021-01-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.