Takaaki Ishiyama, M.D.
NPI 1386865822 · Hospitalist Physician · Saint Louis, MO
Enrolled with Medicare as Practitioner - Hospitalist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Takaaki Ishiyama, M.D. is a Hospitalist Physician provider in Saint Louis, MO (NPI 1386865822).
Provider details
- NPI number
- 1386865822
- Entity type
- Individual
- Primary specialty
- Hospitalist PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 2008022989 (MO)
Specialties & taxonomies
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
19 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
415 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 35 Minutes99232 | 182 | $76 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 126 | $116 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 35 | $77 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 23 | $170 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 19 | $112 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-05-01
- Last updated
- 2021-02-01
- Certified
- 2021-02-01
Frequently asked questions
- What is Takaaki Ishiyama's NPI number?
- Takaaki Ishiyama's National Provider Identifier (NPI) is 1386865822, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Takaaki Ishiyama's specialty?
- Takaaki Ishiyama is listed in the NPPES registry with a primary specialty of Hospitalist Physician (Allopathic & Osteopathic Physicians).
- Where is Takaaki Ishiyama located?
- Takaaki Ishiyama's practice location on file with NPPES is 1201 S Grand Blvd, Saint Louis, MO 63104-1016.
- What is Takaaki Ishiyama's phone number?
- The practice phone number listed in the NPPES registry for Takaaki Ishiyama is (314) 317-0600.
- Does Takaaki Ishiyama accept Medicare?
- Takaaki Ishiyama is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Takaaki Ishiyama's NPI active?
- Yes — Takaaki Ishiyama's NPI (1386865822) is active in the NPPES registry as of the last update on 2021-02-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.