Johns Hopkins University
NPI 1447221726 · Clinical Medical Laboratory · Baltimore, MD
Enrolled with Medicare as Part B Supplier - Independent Clinical Laboratory · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Johns Hopkins University is a Clinical Medical Laboratory organization in Baltimore, MD (NPI 1447221726).
Provider details
- NPI number
- 1447221726
- Entity type
- Organization
- Primary specialty
- Clinical Medical LaboratoryLaboratories
- Parent organization
- Johns Hopkins University
- Organization subpart
- Yes
- Authorized official
- Nick Giarrantano, Prov(410) 933-0000
Specialties & taxonomies
Laboratories
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 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
22,027 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) |
|---|---|---|
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity88305 | 5,503 | $74 |
| Surgical Pathology Consultation and Report on Referred Slides Prepared Elsewhere88321 | 3,586 | $99 |
| Special Stained Specimen Slides to Examine Tissue, Each Additional Procedure88341 | 2,936 | $90 |
| Special Stained Specimen Slides to Examine Tissue, Initial Procedure88342 | 1,374 | $108 |
| Cell Examination of Specimen, Selective Cellular Enhancement Technique88112 | 1,365 | $71 |
| Microscopic Genetic Analysis of Tumor, Manual88360 | 1,109 | $124 |
Practice location
Mailing address
Other names (DBA / former)
- Doing business as
- Jhu - Reference Laboratory
- Doing business as
- Jhu - Reference Laboratory
Registry dates
- Enumerated
- 2006-01-27
- Last updated
- 2025-07-22
- Certified
- 2025-07-10
Frequently asked questions
- What is Johns Hopkins University's NPI number?
- Johns Hopkins University's National Provider Identifier (NPI) is 1447221726, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Johns Hopkins University?
- Johns Hopkins University is classified in the NPPES registry as Clinical Medical Laboratory (Laboratories).
- Where is Johns Hopkins University located?
- Johns Hopkins University's practice location on file with NPPES is 600 N Wolfe St, Baltimore, MD 21287-0005.
- What is Johns Hopkins University's phone number?
- The practice phone number listed in the NPPES registry for Johns Hopkins University is (410) 933-1328.
- Does Johns Hopkins University accept Medicare?
- Johns Hopkins University is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Who is the authorized official for Johns Hopkins University?
- The authorized official listed on Johns Hopkins University's NPPES record is Nick Giarrantano, Prov. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Johns Hopkins University's NPI active?
- Yes — Johns Hopkins University's NPI (1447221726) is active in the NPPES registry as of the last update on 2025-07-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.