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MASARU ISHII M.D.,PH.D.
NPI 1427004381
Otolaryngology in Baltimore, MD

Active since May 25, 2006PECOS Enrolled
74.39/100
CMS Quality Rating
4940 EASTERN AVE, BALTIMORE, MD 21224(410) 550-2368 Get Directions Write a Review

NPPES record last updated: February 8, 2013. Verified against the NPPES registry weekly; last sync: August 09, 2026.

About Masaru Ishii M.d.,ph.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MASARU ISHII M.D.,PH.D. (NPI 1427004381) is an individual otolaryngology provider in Baltimore, Maryland, licensed in Maryland (D59315) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, is affiliated with Johns Hopkins Hospital, The, and is a graduate of Perelman School Of Med At The University Of Pennsylvania (1997).

NPPES Registry Identity

NPI1427004381
Entity TypeIndividualMale
Primary Taxonomy207Y00000X
Provider Legal NameMASARU ISHIICredential: M.D.,PH.D.
Location Address4940 EASTERN AVEBaltimore, MD 21224-2735
Mailing AddressPo Box 64588Baltimore, MD 21264-4588 · (410) 550-0460
Phone(410) 550-2368
Sole ProprietorNo
Medical School CMSPerelman School Of Med At The University Of PennsylvaniaGraduated 1997
Enumeration DateMay 25, 2006
Last NPPES UpdateFebruary 8, 2013
✔ NPI 1427004381 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOtolaryngologyAllopathic & Osteopathic Physicians
Taxonomy Code207Y00000X
License✔ Licensed in MD · D59315
Definition
An otolaryngologist-head and neck surgeon provides comprehensive medical and surgical care for patients with diseases and disorders that affect the ears, nose, throat, the respiratory and upper alimentary systems and related structures of the head and neck. An otolaryngologist diagnoses and provides medical and/or surgical therapy or prevention of diseases, allergies, neoplasms, deformities, disorders and/or injuries of the ears, nose, sinuses, throat, respiratory and upper alimentary systems, face, jaws and the other head and neck systems. Head and neck oncology, facial plastic and reconstructive surgery and the treatment of disorders of hearing and voice are fundamental areas of expertise.
4940 EASTERN AVE, Baltimore, MD 21224
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Other Identifiers 3

Medicare UPINH70296MD
Medicare PINKR60E650MD
Medicaid384050600MD

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Masaru Ishii M.d.,ph.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID3779616628
PECOS Enrollment IDI20100729000643
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 8

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Diagnostic exam of nasal passages using an endoscope 31231
A diagnostic exam of nasal passages using an endoscope is a non-invasive procedure. A small, flexible tube with a light and camera at the end, called an endoscope, is inserted into the nose. This allows the doctor to view the nasal passages and sinuses, helping to identify any issues.
196 services110 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
75 services52 patients
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212
This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.
68 services52 patients
Diagnostic exam of nasal passages using an endoscope 31231
A diagnostic exam of nasal passages using an endoscope is a non-invasive procedure. A small, flexible tube with a light and camera at the end, called an endoscope, is inserted into the nose. This allows the doctor to view the nasal passages and sinuses, helping to identify any issues.
55 services38 patients
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
29 services24 patients
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212
This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.
24 services20 patients

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Johns Hopkins Hospital, The

Acute Care Hospitals · Baltimore, MD
4/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number210009
Location600 North Wolfe StreetBaltimore, MD 21287 · Baltimore City County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 21224 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$139.05 typical visit price
range $60.73 – $183.44
Typical copayment $34.76 (range $15.18 – $45.86)
Most-billed visit code 99204
Established Patient
$75.47 typical visit price
range $19.60 – $149.17
Typical copayment $18.86 (range $4.90 – $37.29)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

74.39/100
MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program
Scored as part of a group practice
Quality64.71
Promoting Interoperability97
Improvement Activities40
Cost52.43

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. SUSRUTHA KOTWAL MD
Internal Medicine
4940 EASTERN AVE, MFL BLDG, WEST TOWER, 6TH FLOOR
BALTIMORE, MD 21224
Baltimore City (410) 550-5018
DR. SAMANTHA A WOLFE MD
Otolaryngology
4940 EASTERN AVE
BALTIMORE, MD 21224
Baltimore City (410) 550-2370
MARK MILEY PA-C
Physician Assistant
4940 EASTERN AVE
BALTIMORE, MD 21224
Baltimore City (410) 550-9227
REID C. WILKINS MD
Pathology (Anatomic Pathology & Clinical Pathology)
4940 EASTERN AVE
BALTIMORE, MD 21224
Baltimore City (410) 550-5568
DEREK MASON MD, MPH
Student in an Organized Health Care Education/Training Program
4940 EASTERN AVE
BALTIMORE, MD 21224
Baltimore City (410) 550-0100
RUCHITA SUDHIR PENDSE MD
Obstetrics & Gynecology (Gynecology)
4940 EASTERN AVE
BALTIMORE, MD 21224
Baltimore City (410) 550-5568
VIVIANA KATHERINE PEARSON NEONATAL NURSE PRACT
Registered Nurse (Neonatal Intensive Care)
4940 EASTERN AVE
BALTIMORE, MD 21224
Baltimore City (443) 297-7701
BRUCE ROBERT GIBSON M.D.
Surgery
4940 EASTERN AVE
BALTIMORE, MD 21224
Baltimore City (410) 550-0100

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Masaru Ishii's NPI number?

The NPI number for Masaru Ishii is 1427004381. It was assigned to this individual provider in the NPPES registry on May 25, 2006.

Where is Masaru Ishii located?

Masaru Ishii practices at 4940 Eastern Ave, Baltimore, MD 21224. The listed phone number is (410) 550-2368.

What is Masaru Ishii's specialty?

The primary specialty registered for this NPI is Otolaryngology with taxonomy code 207Y00000X.

Is Masaru Ishii enrolled in Medicare?

Yes. Masaru Ishii is registered in the Medicare PECOS enrollment system.

Is Masaru Ishii affiliated with any hospitals?

According to CMS data, Masaru Ishii is affiliated with Johns Hopkins Hospital, The.

When was this NPI record last updated?

The NPPES record for Masaru Ishii was last updated on February 8, 2013. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 13 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.