Provider Profile
Callie J. Grenier, FNP-C
Unclaimed ProfileAbout Callie Grenier
Callie J. Grenier, FNP-C is a nurse practitioner practicing in Chelmsford, MA. Callie is also listed as specializing in nurse practitioner — family. Medicare claims data shows Callie provided 2,144 services to 1,241 patients.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Specialty
Credentials & Licensing
Source: NPPES NPI Registry
Contact Information
- (978) 685-2460
- Email not available
Practice Locations
290 LITTLETON RD UNIT 3
Chelmsford, MA 01824
Procedures Most Often Billed to Medicare
2,144 services · 1,241 patients · 5 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes | Office visit | 99309 |
1,092 |
| Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes | Office visit | 99310 |
530 |
| Nursing facility discharge management, more than 30 minutes | Office visit | 99316 |
330 |
| Advance care planning, first 30 minutes | Office visit | 99497 |
160 |
| Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, 20 minutes or more | Office visit | 99308 |
32 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other nurse practitioners at this location 8
Same specialty, same street address — most likely the same department or group.
Related specialists at this location 8
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 22 related providers in 3 groups
Other nurse practitioners in Chelmsford 7
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 2018 at Other 7
Providers who graduated from the same medical school in the same year.
Common questions
What is Callie J. Grenier's specialty?
Callie J. Grenier is a nurse practitioner in Chelmsford, MA. That is the designation recorded for this NPI in the federal registry.
NPI registry
Where can I find Callie J. Grenier?
Callie J. Grenier is listed at 290 Littleton Rd Unit 3, Chelmsford, MA 01824. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Callie J. Grenier?
The number on file is (978) 685-2460. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is the NPI for Callie J. Grenier?
Callie J. Grenier's National Provider Identifier is 1275099723. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Callie J. Grenier's education?
Callie J. Grenier attended Other, graduating in 2018. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Callie J. Grenier have?
Callie J. Grenier has 8 years experience. Calculated from a graduation year of 2018, reported in the CMS National Downloadable File.
CMS public data
What is Callie J. Grenier known for?
According to Medicare billing data, Callie J. Grenier the Medicare record under this individual NPI shows mainly office visits and diagnostic testing. Hospital-based physicians usually have their procedural work billed by the facility rather than under their own number, so this is a floor on their practice, not a description of it. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Callie J. Grenier's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Callie J. Grenier. If this is you, claiming it is free.
Guide.md
Provider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.