NPI registry status
Active
2026 NPPES data Nurse Practitioner NPI 1699843094 CRNP
Verify on CMS → John Grandner, CRNP
Nurse Practitioner in Rockville, Maryland.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 87,700 in Nurse Practitioner, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
What the federal data shows
John Grandner, CRNP is a Nurse Practitioner in Rockville, Maryland, listed in the federal CMS National Provider Identifier registry.
- #27
- Nurse Practitioner rank among Maryland specialties
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
CMS NPPES provider registry desk
NPI 1699843094 · Nurse Practitioner
NPI-10 · ENUM-LEGACY · TAX-MEGA · RX-NONE · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1699843094
- ENUM-LEGACY 2006
- TAX-MEGA 88K Nurse Practitioner
- RX-NONE No Part D
- BOOK-LIGHT 1,233 in Maryland
- PHOTO-ENUM Jodylynn Mill · 2006
What does the federal data show about John Grandner, CRNP?
Quality data not reportedPrimary specialty
Nurse Practitioner
Specialty distribution in Maryland
How Nurse Practitioner compares to other specialties among Maryland providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Nurse Practitioner. Verify directly:
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Practice Address
Provider Details
| NPI | 1699843094 |
|---|---|
| Specialty | Nurse Practitioner |
| Credentials | CRNP |
| Gender | Male |
| NPI Issued | 12/01/2006 |
Nurse Practitioner Overview
How John Grandner, CRNP fits within the Nurse Practitioner landscape nationally.
87,700
Nurse Practitioner Providers in US
56
States with Nurse Practitioner
1,084
Avg Claims per Provider
Nationwide Nurse Practitioner peers with similar MIPS or enrollment year
Two federal-record peer sets for Grandner, both outside Maryland so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Nurse Practitioner Providers in Maryland
Other clinicians with the same primary specialty enrolled in Maryland, drawn from the same CMS NPPES roster as Grandner.
One of 1,233 Nurse Practitioner providers enrolled in Maryland, 5 are shown here.
Dr. Deepa Abhilash
CRNP
Salisbury, MD
Meron Abiy
Rockville, MD
Dr. Krystal Abucevicz-Swick
CRNP
Cumberland, MD
Lilian Achi
Bowie, MD
Ann Acosta
Waldorf, MD
Compare Nurse Practitioner nationally: see state-by-state distribution →
Frequently Asked Questions
What is John Grandner, CRNP's specialty? ▼
John Grandner, CRNP specializes in Nurse Practitioner and practices in Rockville, Maryland. Credentials: CRNP.
Where is John Grandner, CRNP located? ▼
John Grandner, CRNP is located at 2101 E JEFFERSON ST, Rockville, MD, 20852. Phone: (202) 898-5104.
What is John Grandner, CRNP's NPI number? ▼
John Grandner, CRNP's National Provider Identifier (NPI) is 1699843094, issued on 12/01/2006.
How many Nurse Practitioner providers are there in the US? ▼
There are 87,700 Nurse Practitioner providers across 56 states in the US. The average Nurse Practitioner provider writes 1,084 Medicare Part D claims per year.
Does John Grandner, CRNP accept Medicare? ▼
John Grandner, CRNP appears in CMS Medicare data. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify John Grandner, CRNP's credentials? ▼
John Grandner, CRNP's NPI is 1699843094 with credentials CRNP. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.