Callie Jean Grenier, FNP-C
Family Nurse Practitioner · Chelmsford, MA
Callie Jean Grenier, FNP-C is a family nurse practitioner with a practice address in Chelmsford, Massachusetts, and NPI 1275099723, issued on Feb 20, 2019. Check the license (Massachusetts RN2260921, as entered in NPPES) with the Massachusetts board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Callie Jean Grenier
- Credential
- FNP-C
- Primary taxonomy
- Family Nurse Practitioner 363LF0000X
- License numbers
- RN2260921 MA
061024-23 NH
Self-reported in NPPES; status is on the state search - Practice location
- 290 Littleton RD Unit 3, Chelmsford, MA 01824
- Phone
- (978) 685-2460
- Enumerated
- Feb 20, 2019
- Record last updated
- May 28, 2025
- Medicare enrollment
- Enrolled (PECOS I20211207001705); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest family nurse practitioner records → All 4,724 in Massachusetts → Look up another NPI →
Also registered at 290 Littleton RD Unit 3
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Leanne Aguirre, NPFamily Nurse Practitioner1720741465
- Rachelle Archard, CNPAdult Health Nurse Practitioner1598400079
- Laura BauerNurse Practitioner1164078838
- Diana Bishop, NPNurse Practitioner1447954177
- Amanda Bonomo, FNP-BCFamily Nurse Practitioner1912623588
- Elnora Burton, ARNPFamily Nurse Practitioner1659694768
Verify Callie Jean Grenier in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Massachusetts board licenses this profession
Search for license RN2260921Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Most of these Medicare Part D claims are vaccines, 82% of the cost of the top drugs
816 Medicare Part D claims for 171 beneficiaries, against an average of 1,305 among the 140,557 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 51 claims were for opioids.
Most prescribed
Pharmacies often give vaccines under a standing order that names one clinician, and CMS counts every such claim under that clinician's NPI. These claims are therefore not a measure of this clinician's own prescribing.
- Mirtazapine38 claims
- Arexvy31 claims
- Gabapentin31 claims
- Furosemide28 claims
- Levothyroxine Sodium28 claims
- Atorvastatin Calcium25 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $146.40
2 payments; by number, the most common kind was food and beverage; the largest payer was Otsuka America Pharmaceutical, Inc. The 99,489 providers of this specialty with any payment received $650.95 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Lawrence General Community Medical Service PLLCSalem, NH
- New England Community Medical Services PLLCSalem, NH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Callie Jean Grenier among 4,724 family nurse practitioner records in Massachusetts
Callie Jean Grenier, FNP-C is one of 4,724 family nurse practitioner records with a practice address in Massachusetts. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 54% of them.
- NPI issued2019 · 54% of these records are older, 40% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 57% of these records are
- Graduated2018 · median 2019 among the 2,704 with a school on file
- Record last updated2025 · 42% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363LF0000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
39 family nurse practitioner records list a practice address in Chelmsford
They are 39 of the 937 NPPES records with a practice address in Chelmsford, and 4,724 family nurse practitioner records in Massachusetts.
All 4,724 in Massachusetts → Every provider in Chelmsford → Family Nurse Practitioner nationwide →
The 8 family nurse practitioner records with the nearest ZIP codes
- Elnora Burton, ARNPChelmsford, MA 018241659694768
- Virginia Crowley, F.N.P.Chelmsford, MA 018241538310743
- Rogere Errie, NPChelmsford, MA 018241437487204
- Mary Farrahar, NURSE PRACTITIONERChelmsford, MA 018241316992555
- Kimberly Hall, NPChelmsford, MA 018241760591309
- Heather Hansson, FNP-BCChelmsford, MA 018241407131113
- Breana Kelly, FNP-CChelmsford, MA 018241740678358
- Laurel MartensChelmsford, MA 018241730427899
Common questions
What is Callie Jean Grenier, FNP-C's NPI number?
Callie Jean Grenier, FNP-C's National Provider Identifier (NPI) is 1275099723, issued on Feb 20, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Callie Jean Grenier, FNP-C located?
The NPPES record lists a practice address at 290 Littleton RD Unit 3, Chelmsford, MA, 01824. Phone: (978) 685-2460. Providers update this record themselves, so call before visiting.
How can I verify Callie Jean Grenier, FNP-C's license?
NPPES lists Massachusetts license number RN2260921, as entered by the provider. Search the Massachusetts board that licenses this profession; the NPPES record confirms identity only.
How much does Callie Jean Grenier, FNP-C prescribe under Medicare Part D?
In 2024, Callie Jean Grenier, FNP-C had 816 Medicare Part D claims for 171 beneficiaries; the average among family nurse practitioner prescribers was 1,305. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.