Doctor profile · Federal record
Dr. Preston Ashby, DO
Internal Medicine Physician (CMS: Internal Medicine) · Chandler, AZ
- NPI 1992183198
- Accepts Medicare
- 11 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 4 locations .
- Primary practice
-
1955 W Frye RD
Chandler, AZ 852246282
(480) 728-7161 - Additional location
-
1301 S Crismon RD
Mesa, AZ 852093767
(480) 358-6100 - Additional location
-
5801 S McClintock Dr Ste 104
Tempe, AZ 852836002
(623) 220-2601 - Additional location
-
5880 S Hospital Dr
Globe, AZ 855019447
(303) 390-1940 - Mailing address
-
4530 E Muirwood Dr Ste 105
Phoenix, AZ 850487693
Show 1 more location
Credentials & registration
- NPI registered
- May 2015 — 11 yrs on file
- Profile last updated
- December 16, 2025
- Year of graduation
- 2015 — 11 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- Arizona #007541
- Medicaid
- AZ #397833
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1992183198. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,015
Distinct HCPCS
8
Medicare allowed
$122,502
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99233 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | 455 | 206 | $115 | |
99239 |
Hospital discharge day management, more than 30 minutes | 206 | 202 | $111 | |
99223 |
Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes | 105 | 104 | $168 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 101 | 75 | $77 | |
99291 |
Critical care, first 30-74 minutes | 68 | 25 | $207 | |
99497 |
Advance care planning, first 30 minutes | 33 | 33 | $73 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 29 | 29 | $125 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 18 | 15 | $94 |
In context: peer comparison
Among 36 peers in this city , average services per provider: 186. This provider delivers 5.5× the peer median.Open Payments
Industry payments received
All-time total
$25
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Janssen Pharmaceuticals, Inc | 1 | $25.03 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
33
Patients
31
Total drug cost
$210
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Oxycodone Hcl | Generic | 20 | 20 | $100 |
| Pantoprazole Sodium | Generic | 13 | 11 | $110 |
Hospital affiliations
Frequently asked questions
What is Dr. Preston Ashby's medical specialty?
Dr. Preston Ashby practices Internal Medicine Physician in Chandler, AZ.
Where does Dr. Preston Ashby practice?
Dr. Preston Ashby practices at 1955 W Frye RD, Chandler, AZ 852246282. Office phone: 4807287161.
What is Dr. Preston Ashby's NPI?
Dr. Preston Ashby's National Provider Identifier (NPI) is 1992183198, issued by NPPES.
Does Dr. Preston Ashby accept Medicare assignment?
Yes. Dr. Preston Ashby accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Preston Ashby commonly perform?
Top Medicare-reported procedures in 2023: Subsequent hospital care with moderate levelof medical decision making (HCPCS 99233); Hospital discharge day management (HCPCS 99239); Initial hospital care with moderate level of medical decision making (HCPCS 99223). Source: CMS Medicare Physician & Other Practitioners file.