Kathryn Cappell, MD
NPI 1366785255 · Hematology (Internal Medicine) Physician · Fairfax, VA
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kathryn Cappell, MD is a Hematology (Internal Medicine) Physician provider in Fairfax, VA (NPI 1366785255).
Provider details
- NPI number
- 1366785255
- Entity type
- Individual
- Primary specialty
- Hematology (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- 0101271507 (VA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
13 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
6 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
47 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 47 | $127 |
Typical Medicare-allowed amounts for these services range $127–$127 (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.
Practice location
Mailing address
Additional practice locations (5)
- 300 Pasteur DrLane 154Stanford, CA 94305-5133Phone: (650) 723-6661
- 4320 Seminary RdAlexandria, VA 22304-1535Phone: (703) 504-3000Fax: (703) 504-3388
- 3600 Joseph Siewick DrFairfax, VA 22033-1709Phone: (703) 391-3600Fax: (703) 391-3414
- 3300 Gallows RdFalls Church, VA 22042-3307Phone: (703) 776-4001Fax: (703) 776-7113
- 44045 Riverside PkwyLeesburg, VA 20176-5101Phone: (703) 858-6000Fax: (703) 858-6900
Registry dates
- Enumerated
- 2013-03-29
- Last updated
- 2021-08-26
- Certified
- 2021-08-26
Frequently asked questions
- What is Kathryn Cappell's NPI number?
- Kathryn Cappell's National Provider Identifier (NPI) is 1366785255, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kathryn Cappell's specialty?
- Kathryn Cappell is listed in the NPPES registry with a primary specialty of Hematology (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Kathryn Cappell located?
- Kathryn Cappell's practice location on file with NPPES is 8081 Innovation Park Dr, Fairfax, VA 22031-4867.
- What is Kathryn Cappell's phone number?
- The practice phone number listed in the NPPES registry for Kathryn Cappell is (571) 472-4724.
- Does Kathryn Cappell accept Medicare?
- Kathryn Cappell is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kathryn Cappell's NPI active?
- Yes — Kathryn Cappell's NPI (1366785255) is active in the NPPES registry as of the last update on 2021-08-26.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.