Doctor profile · Federal record
Dr. Shelly Castles, MD
Family Medicine Physician (CMS: Family Practice) · Billings, MT
- NPI 1952410953
- Accepts Medicare
- 29 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
2675 Central Ave
Billings, MT 591026686
(406) 238-2500 - Mailing address
-
Po Box 35100
Billings, MT 591075100
Credentials & registration
- NPI registered
- August 2006 — 20 yrs on file
- Profile last updated
- February 22, 2022
- Year of graduation
- 1997 — 29 yrs since
- Specialty taxonomy
- 207Q00000X — NUCC code
- State license (1)
- Montana #8422
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1952410953. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
377
Distinct HCPCS
5
Medicare allowed
$31,514
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 175 | 113 | $80 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 122 | 102 | $98 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 46 | 40 | $66 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 20 | 19 | $66 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 14 | 13 | $88 |
In context: peer comparison
Among 28 peers in this city , average services per provider: 74. This provider delivers 5.1× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
1,850
Patients
469
Total drug cost
$21,517
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Levothyroxine Sodium | Generic | 298 | 64 | $3,090 |
| Atorvastatin Calcium | Generic | 193 | 49 | $2,684 |
| Lisinopril | Generic | 143 | 35 | $1,019 |
| Losartan Potassium | Generic | 131 | 37 | $1,646 |
| Simvastatin | Generic | 130 | 36 | $959 |
| Omeprazole | Generic | 129 | 37 | $1,912 |
| Metoprolol Succinate | Generic | 121 | 20 | $1,737 |
| Gabapentin | Generic | 112 | 29 | $1,704 |
| Metformin Hcl Er (Metformin Hcl) | Brand | 105 | 26 | $1,071 |
| Rosuvastatin Calcium | Generic | 103 | 33 | $1,913 |
Frequently asked questions
What is Dr. Shelly Castles's medical specialty?
Dr. Shelly Castles practices Family Medicine Physician in Billings, MT.
Where does Dr. Shelly Castles practice?
Dr. Shelly Castles practices at 2675 Central Ave, Billings, MT 591026686. Office phone: 4062382500.
What is Dr. Shelly Castles's NPI?
Dr. Shelly Castles's National Provider Identifier (NPI) is 1952410953, issued by NPPES.
Does Dr. Shelly Castles accept Medicare assignment?
Yes. Dr. Shelly Castles accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Shelly Castles 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 99215); Established patient office or other outpatient visit (HCPCS 99213). Source: CMS Medicare Physician & Other Practitioners file.