Dr. Peter Illei , MD
Pathology - Anatomic Pathology โข Baltimore, MD
401 N Broadway St, Weinberg Bldg. Rm. 2242
Baltimore, MD 212312410
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Dr. Peter Illei is listed in NPPES under Pathology - Anatomic Pathology.
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NPI assigned on August 29, 2005; this date does not establish years in practice.
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Published CMS data list 2,114 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 88305 โ Pathology examination of tissue using a microscope, intermediate complexity: 490 service units.
- 88360 โ Microscopic genetic analysis of tumor, manual: 375 service units.
- 88173 โ Evaluation of fine needle aspirate with interpretation and report: 362 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 13 records in the table ยท Guide: How to read Medicare Part B data
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More Medicare Part B services than 75% of clinicians listed under Pathology - Anatomic Pathology in Baltimore, MD (2024, 28 clinicians with data). Median for this group: 1,065. Middle half: 566 to 2,113.
More Medicare Part B services than 70% of clinicians listed under Pathology - Anatomic Pathology in Maryland (2024, 35 clinicians with data). Median for this group: 1,167. Middle half: 563 to 2,127.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 1,448 in 2020 to 2,114 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
401 N Broadway St
Weinberg Bldg. Rm. 2242
Baltimore, MD 212312410
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: Johns Hopkins University. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
1988
What Public CMS Data Show
Pathology - Anatomic Pathology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
800 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider, 2024.
Medicare-allowed amount
About $84,416 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
Paid by Medicare
About $66,564 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
Open Payments general payments, program year 2025
All general payments: $13,019.56 across 14 records.
By nature of payment
- Consulting Fee: $11,855.00 across 2 records.
- Travel and Lodging: $660.40 across 2 records.
- Food and Beverage: $504.16 across 10 records.
Reporting-company totals
- Boehringer Ingelheim Pharmaceuticals, Inc.: $10,844.56 across 13 records.
- ABBVIE INC.: $2,175.00 across 1 record.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
38 years (graduated 1988)
CMS Doctors and Clinicians data list 1988 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2005
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
May accept Medicare assignment
CMS data show this clinician may accept Medicare assignment. Clinicians who do not always accept assignment can decide case by case.
Ask the office before your visit. If a clinician does not accept assignment for a service, they can charge up to 15% more than the Medicare-approved amount, and you may be asked to pay the full amount at the visit.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, โDoes your provider accept Medicare as full payment?โ
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Illei has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Illei as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Baltimore and Maryland
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 75% of clinicians listed under Pathology - Anatomic Pathology in Baltimore, MD (2024, 28 clinicians with data). Median for this group: 1,065. Middle half: 566 to 2,113.
More Medicare Part B services than 70% of clinicians listed under Pathology - Anatomic Pathology in Maryland (2024, 35 clinicians with data). Median for this group: 1,167. Middle half: 563 to 2,127.
Medicare-allowed amount
A higher Medicare-allowed amount than 75% of clinicians listed under Pathology - Anatomic Pathology in Baltimore, MD (2024, 28 clinicians with data). Median for this group: $33,523. Middle half: $23,344 to $83,625.
A higher Medicare-allowed amount than 70% of clinicians listed under Pathology - Anatomic Pathology in Maryland (2024, 35 clinicians with data). Median for this group: $34,172. Middle half: $21,261 to $88,505.
Paid by Medicare
A higher Medicare payment amount than 75% of clinicians listed under Pathology - Anatomic Pathology in Baltimore, MD (2024, 28 clinicians with data). Median for this group: $25,707. Middle half: $18,359 to $65,994.
A higher Medicare payment amount than 70% of clinicians listed under Pathology - Anatomic Pathology in Maryland (2024, 35 clinicians with data). Median for this group: $25,861. Middle half: $16,657 to $69,553.
46 active clinicians are listed under Pathology - Anatomic Pathology with a practice address in Baltimore, MD (88 in Maryland).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Baltimore
0% of these 46 clinicians have the CMS telehealth indicator.
34.8% of these 46 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services increased 46% from 1,448 in 2020 to 2,114 in 2024.
- 2020: 1,448
- 2021: 1,616
- 2022: 1,786
- 2023: 1,952
- 2024: 2,114
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Medicare-allowed amount
Medicare-allowed amount increased 25% from $67,282 in 2020 to $84,416 in 2024.
- 2020: $67,282
- 2021: $71,266
- 2022: $76,905
- 2023: $83,631
- 2024: $84,416
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Paid by Medicare
Paid by Medicare increased 25% from $53,321 in 2020 to $66,564 in 2024.
- 2020: $53,321
- 2021: $56,969
- 2022: $61,323
- 2023: $66,346
- 2024: $66,564
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Industry payments (Open Payments)
Industry payments (Open Payments) varied from year to year: $13,367.19 in 2021 and $13,019.56 in 2025.
- 2021: $13,367.19
- 2022: $49,594.71
- 2023: $21,586.49
- 2024: $13,492.85
- 2025: $13,019.56
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 โ December 31, 2025): 14 records totaling $13,019.56.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Boehringer Ingelheim Pharmaceuticals, Inc. |
Consulting Fee
Cash or cash equivalent
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โ | General | $9,680.00 |
| ABBVIE INC. |
Consulting Fee
Cash or cash equivalent
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EMRELIS | General | $2,175.00 |
| Boehringer Ingelheim Pharmaceuticals, Inc. |
Travel and Lodging
In-kind items and services
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โ | General | $520.40 |
| Boehringer Ingelheim Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
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โ | General | $144.99 |
| Boehringer Ingelheim Pharmaceuticals, Inc. |
Travel and Lodging
In-kind items and services
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โ | General | $140.00 |
| Boehringer Ingelheim Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
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โ | General | $49.99 |
| Boehringer Ingelheim Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
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โ | General | $48.07 |
| Boehringer Ingelheim Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
โ | General | $40.00 |
| Boehringer Ingelheim Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
โ | General | $40.00 |
| Boehringer Ingelheim Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
โ | General | $38.46 |
| Boehringer Ingelheim Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
โ | General | $38.46 |
| Boehringer Ingelheim Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
โ | General | $35.27 |
| Boehringer Ingelheim Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
โ | General | $35.00 |
| Boehringer Ingelheim Pharmaceuticals, Inc. |
Food and Beverage
In-kind items and services
|
โ | General | $33.92 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016โ2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ by Provider and Service data, 2017โ2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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88305
Pathology examination of tissue using a microscope, intermediate complexity
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490 | 334 | $178.47 | $36.44 |
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88360
Microscopic genetic analysis of tumor, manual
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375 | 279 | $184.14 | $40.77 |
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88173
Evaluation of fine needle aspirate with interpretation and report
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362 | 222 | $243.00 | $67.87 |
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88341
Special stained specimen slides to examine tissue, each additional procedure
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302 | 79 | $92.00 | $27.54 |
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88108
Cell examination of specimen, concentration technique
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180 | 162 | $205.00 | $22.15 |
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88342
Special stained specimen slides to examine tissue, initial procedure
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107 | 101 | $148.00 | $34.31 |
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88112
Cell examination of specimen, selective cellular enhancement technique
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81 | 77 | $204.00 | $27.17 |
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88172
Evaluation of fine needle aspirate
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68 | 54 | $135.00 | $34.38 |
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88307
Pathology examination of tissue using a microscope, moderately high complexity
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41 | 22 | $275.00 | $80.28 |
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88344
Special stained specimen slides to examine tissue, each multiplex procedure
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37 | 37 | $131.97 | $37.74 |
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88312
Special stained specimen slides to identify organisms including interpretation and report
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35 | 19 | $204.00 | $26.14 |
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88313
Special stained specimen slides to examine tissue including interpretation and report
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24 | 21 | $43.00 | $11.95 |
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88141
Pap test
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12 | 12 | $89.00 | $24.90 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 207ZP0101X
A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.
NUCC Taxonomy Code: 207ZP0101X
A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - PATHOLOGY
I20181108000300
DC
5496790867
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Johns Hopkins University
600 N Wolfe St, Baltimore, MD 212870005
Phone: 4105024340
Johns Hopkins University
5755 Cedar Ln, Columbia, MD 210442999
Phone: 4107407890
Johns Hopkins University
5755 Cedar Ln, Columbia, MD 210442912
Phone: 4107407544
Johns Hopkins University
5255 Loughboro Road Nw, Washington, DC 200162633
Phone: 2026606500
Johns Hopkins University
8600 Old Georgetown Rd, Bethesda, MD 208141422
Phone: 3018963100
Johns Hopkins University
4940 Eastern Ave, Baltimore, MD 212242735
Phone: 4105500100
Johns Hopkins University
600 N Wolf St, Baltimore, MD 212870005
Phone: 4109555000
Johns Hopkins University
5759 Cedar Ln, Columbia, MD 210442912
Phone: 4437183738
Johns Hopkins University
5255 Loughboro Rd Nw, Washington, DC 200162633
Phone: 2025374000
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Nurse Practitioner - Acute Care
Nurse Practitioner - Adult Health
Pathology - Anatomic Pathology & Clinical Pathology
Pathology - Anatomic Pathology
Doctor of Medicine (M.D.)
Nurse Practitioner - Family
Certified Registered Nurse Practitioner
Internal Medicine - Medical Oncology
Doctor of Medicine (M.D.)
Career & Practice History
NPI enumerated August 29, 2005.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to November 2026.
NPI Administrative Meta
Other Pathology - Anatomic Pathology Specialists in Baltimore
- Dr. Scott Robertson, MD, PhD
- Dr. Cinthia Drachenberg, MD
- Dr. Robert Moore, MD
- Dr. Chien-Kuang Ding, MD, PhD
- Dr. Natalie Banet, MD
- Tamara Lotan
Mailing Address
Po Box 64478
Baltimore, MD 212644478