Doctor profile · Federal record
Dr. Callie Grenier, FNP-C
Family Nurse Practitioner (CMS: Nurse Practitioner) · Family Nurse Practitioner · Chelmsford, MA
- NPI 1275099723
- Accepts Medicare
- 8 yrs in practice
- Licensed in 2 states
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
290 Littleton RD Unit 3
Chelmsford, MA 018243429
(978) 685-2460
Credentials & registration
- NPI registered
- February 2019 — 7 yrs on file
- Profile last updated
- May 28, 2025
- Year of graduation
- 2018 — 8 yrs since
- Specialty taxonomy
- 363LF0000X — NUCC code
- State licenses (2)
- Massachusetts #RN2260921 · New Hampshire #061024-23
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1275099723. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,924
Distinct HCPCS
5
Medicare allowed
$204,120
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99309 |
Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes | 1,142 | 298 | $98 | |
99310 |
Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes | 350 | 282 | $140 | |
99316 |
Nursing facility discharge management, more than 30 minutes | 276 | 257 | $119 | |
99497 |
Advance care planning, first 30 minutes | 122 | 100 | $68 | |
99308 |
Subsequent nursing facility care with straightforward level of medical decision making, per day, if using time, at least 15 minutes | 34 | 26 | $68 |
In context: peer comparison
Among 12 peers in this city , average services per provider: 229. This provider delivers 8.4× the peer median.Open Payments
Industry payments received
All-time total
$146
Transactions
2
Manufacturers
2
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Otsuka America Pharmaceutical, Inc. | 1 | $116.66 | |
| ACADIA Pharmaceuticals Inc | 1 | $29.74 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
447
Patients
99
Total drug cost
$5,785
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Levothyroxine Sodium | Generic | 51 | 19 | $637 |
| Warfarin Sodium | Generic | 49 | 0 | $355 |
| Atorvastatin Calcium | Generic | 42 | 0 | $601 |
| Lorazepam | Generic | 35 | 21 | $445 |
| Metoprolol Succinate | Generic | 35 | 11 | $713 |
| Mirtazapine | Generic | 35 | 20 | $517 |
| Amlodipine Besylate | Generic | 30 | 11 | $208 |
| Escitalopram Oxalate | Generic | 30 | 0 | $504 |
| Tamsulosin Hcl | Generic | 30 | 0 | $472 |
| Furosemide | Generic | 25 | 17 | $135 |
Frequently asked questions
What is Dr. Callie Grenier's medical specialty?
Dr. Callie Grenier practices Family Nurse Practitioner in Chelmsford, MA.
Where does Dr. Callie Grenier practice?
Dr. Callie Grenier practices at 290 Littleton RD Unit 3, Chelmsford, MA 018243429. Office phone: 9786852460.
What is Dr. Callie Grenier's NPI?
Dr. Callie Grenier's National Provider Identifier (NPI) is 1275099723, issued by NPPES.
Does Dr. Callie Grenier accept Medicare assignment?
Yes. Dr. Callie Grenier accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Callie Grenier commonly perform?
Top Medicare-reported procedures in 2023: Subsequent nursing facility care with moderate level of medical decision making (HCPCS 99309); Subsequent nursing facility care with high level of medical decision making (HCPCS 99310); Nursing facility discharge management (HCPCS 99316). Source: CMS Medicare Physician & Other Practitioners file.