Doctor profile · Federal record
Dr. Masaru Ishii, M.D.,PH.D.
Otolaryngology Physician (CMS: Otolaryngology) · Baltimore, MD
- NPI 1427004381
- MIPS 74.4 / 100 · 2023
- 29 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
4940 Eastern Ave
Baltimore, MD 212242735
(410) 550-2368 - Mailing address
-
Po Box 64588
Baltimore, MD 212644588
Credentials & registration
- NPI registered
- May 2006 — 20 yrs on file
- Profile last updated
- February 8, 2013
- Year of graduation
- 1997 — 29 yrs since
- Specialty taxonomy
- 207Y00000X — NUCC code
- State license (1)
- Maryland #D59315
- Medicaid
- MD #384050600
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1427004381. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
492
Distinct HCPCS
7
Medicare allowed
$63,644
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
31231 |
Diagnostic exam of nasal passages using an endoscope | 253 | 126 | $177 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 80 | 59 | $93 | |
31231 |
Diagnostic exam of nasal passages using an endoscope | 59 | 32 | $58 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 35 | 35 | $117 | |
99212 |
Established patient office or other outpatient visit, 10-19 minutes | 29 | 28 | $57 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 24 | 15 | $69 | |
99212 |
Established patient office or other outpatient visit, 10-19 minutes | 12 | 11 | $38 |
In context: peer comparison
Among 27 peers in Baltimore Otolaryngology Physician, average services per provider: 91. This provider delivers 5.4× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
471
Patients
235
Total drug cost
$10,793
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Fluticasone Propionate | Generic | 131 | 55 | $2,345 |
| Azelastine Hcl | Generic | 97 | 41 | $3,267 |
| Ipratropium Bromide | Generic | 59 | 23 | $1,822 |
| Mupirocin | Generic | 42 | 24 | $338 |
| Doxycycline Monohydrate | Generic | 41 | 33 | $1,086 |
| Prednisone | Generic | 40 | 31 | $226 |
| Famotidine | Generic | 38 | 28 | $722 |
| Mometasone Furoate | Generic | 12 | 0 | $897 |
| Methylprednisolone | Generic | 11 | 0 | $91 |
Hospital affiliations
Frequently asked questions
What is Dr. Masaru Ishii's medical specialty?
Dr. Masaru Ishii practices Otolaryngology Physician in Baltimore, MD.
Where does Dr. Masaru Ishii practice?
Dr. Masaru Ishii practices at 4940 Eastern Ave, Baltimore, MD 212242735. Office phone: 4105502368.
What is Dr. Masaru Ishii's NPI?
Dr. Masaru Ishii's National Provider Identifier (NPI) is 1427004381, issued by NPPES.
Does Dr. Masaru Ishii accept Medicare assignment?
Dr. Masaru Ishii does not accept Medicare assignment for all services. Patients may be billed amounts beyond Medicare-allowed charges.
What procedures does Dr. Masaru Ishii commonly perform?
Top Medicare-reported procedures in 2023: Diagnostic exam of nasal passages using an endoscope (HCPCS 31231); Established patient office or other outpatient visit (HCPCS 99213); Diagnostic exam of nasal passages using an endoscope (HCPCS 31231). Source: CMS Medicare Physician & Other Practitioners file.