Doctor profile · Federal record
Dr. Abigail Holzwarth, DNP, APRN, FNP-BC
Nurse Practitioner · Family Nurse Practitioner · Billings, MT
- NPI 1104544576
- Accepts Medicare
- MIPS 92.8 / 100 · 2023
- 4 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
801 N 29Th St
Billings, MT 591010905
(406) 238-2500 - Mailing address
-
Po Box 35100
Billings, MT 591075100
Credentials & registration
- NPI registered
- August 2022 — 4 yrs on file
- Profile last updated
- January 7, 2026
- Year of graduation
- 2022 — 4 yrs since
- Specialty taxonomy
- 363L00000X — NUCC code
- State license (1)
- Montana #198020
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1104544576. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
369
Distinct HCPCS
3
Medicare allowed
$35,079
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 227 | 140 | $81 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 126 | 102 | $101 | |
90961 |
Dialysis services, 2-3 physician visits per month (20 years or older) | 16 | 15 | $244 |
In context: peer comparison
Among 19 peers in this city , average services per provider: 72. This provider delivers 5.1× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
424
Patients
116
Total drug cost
$8,634
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Amlodipine Besylate | Generic | 68 | 25 | $579 |
| Furosemide | Generic | 45 | 18 | $345 |
| Losartan Potassium | Generic | 44 | 22 | $488 |
| Carvedilol | Generic | 34 | 13 | $283 |
| Spironolactone | Generic | 28 | 14 | $290 |
| Sevelamer Carbonate | Generic | 24 | 12 | $2,788 |
| Lisinopril | Generic | 23 | 0 | $324 |
| Calcitriol | Generic | 22 | 0 | $411 |
| Metoprolol Succinate | Generic | 21 | 0 | $435 |
| Pantoprazole Sodium | Generic | 21 | 0 | $336 |
Frequently asked questions
What is Dr. Abigail Holzwarth's medical specialty?
Dr. Abigail Holzwarth practices Nurse Practitioner in Billings, MT.
Where does Dr. Abigail Holzwarth practice?
Dr. Abigail Holzwarth practices at 801 N 29Th St, Billings, MT 591010905. Office phone: 4062382500.
What is Dr. Abigail Holzwarth's NPI?
Dr. Abigail Holzwarth's National Provider Identifier (NPI) is 1104544576, issued by NPPES.
Does Dr. Abigail Holzwarth accept Medicare assignment?
Yes. Dr. Abigail Holzwarth accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Abigail Holzwarth commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99214); Dialysis services, 2-3 physician visits per month (20 years or older) (HCPCS 90961). Source: CMS Medicare Physician & Other Practitioners file.