Ryan Kieser, M.D.
NPI 1033568795 · Hematology & Oncology Physician · Houston, TX
Enrolled with Medicare as Practitioner - Hematology/Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ryan Kieser, M.D. is a Hematology & Oncology Physician provider in Houston, TX (NPI 1033568795).
Provider details
- NPI number
- 1033568795
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- S2815 (TX)
Specialties & taxonomies
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
10 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
349 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 183 | $127 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 74 | $117 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 35 | $178 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 35 | $173 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 22 | $215 |
Typical Medicare-allowed amounts for these services range $117–$215 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ondansetronbrand: Ondansetron Odt | 39 | 28 |
| Prochlorperazine Maleate | 37 | 25 |
| Dasatinibbrand: Sprycel | 33 | — |
| Apixabanbrand: Eliquis | 31 | — |
| Pregabalin | 31 | 14 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 28 | 14 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-06-03
- Last updated
- 2023-05-23
- Certified
- 2023-05-23
Frequently asked questions
- What is Ryan Kieser's NPI number?
- Ryan Kieser's National Provider Identifier (NPI) is 1033568795, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ryan Kieser's specialty?
- Ryan Kieser is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Ryan Kieser located?
- Ryan Kieser's practice location on file with NPPES is 6445 Main St Fl 24, Houston, TX 77030-1502.
- What is Ryan Kieser's phone number?
- The practice phone number listed in the NPPES registry for Ryan Kieser is (713) 441-9948.
- Does Ryan Kieser accept Medicare?
- Ryan Kieser is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ryan Kieser's NPI active?
- Yes — Ryan Kieser's NPI (1033568795) is active in the NPPES registry as of the last update on 2023-05-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.