Doctor profile · Federal record
Dr. Alan Chang, MD
Gastroenterology Physician (CMS: Gastroenterology) · Specialist · Doylestown, PA
- NPI 1912992330
- Accepts Medicare
- 28 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
599 W State St, Suite 200
Doylestown, PA 189012567
(215) 345-6050
fax (215) 345-6568 - Mailing address
-
Po Box 829641
Philadelphia, PA 191820001
Credentials & registration
- NPI registered
- September 2005 — 21 yrs on file
- Profile last updated
- February 28, 2020
- Year of graduation
- 1998 — 28 yrs since
- Specialty taxonomy
- 207RG0100X — NUCC code
- State license (1)
- Pennsylvania #MD071986L
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1912992330. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,211
Distinct HCPCS
10
Medicare allowed
$155,558
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 230 | 209 | $94 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 174 | 151 | $132 | |
45380 |
Biopsy of large bowel using a flexible endoscope | 137 | 137 | $112 | |
45385 |
Removal of polyps or growths of large bowel using an endoscope with mechanical snare | 133 | 133 | $259 | |
43239 |
Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope | 118 | 113 | $113 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 93 | 62 | $81 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 79 | 77 | $134 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 75 | 75 | $117 | |
99231 |
Subsequent hospital care with straightforward or low level of medical decision making, per day, if using time, at least 25 minutes | 70 | 62 | $51 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 41 | 41 | $173 |
In context: peer comparison
Among 8 peers in this city , average services per provider: 61. This provider delivers 20× the peer median.Open Payments
Industry payments received
All-time total
$3,365
Transactions
116
Manufacturers
15
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| ABBVIE INC. | 29 | $503.99 | |
| Phathom Pharmaceuticals, Inc. | 7 | $306.15 | |
| Takeda Pharmaceuticals U.S.A., Inc. | 16 | $252.84 | |
| GENZYME CORPORATION | 5 | $233.94 | |
| Lilly USA, LLC | 5 | $188.18 | |
| Medtronic, Inc. | 4 | $179.27 | |
| Janssen Biotech, Inc. | 3 | $177.39 | |
| Intercept Pharmaceuticals, Inc. | 4 | $175.80 | |
| Salix Pharmaceuticals, a division of Bausch Health US, LLC | 11 | $161.65 | |
| Gilead Sciences, Inc. | 5 | $161.30 | |
| Celltrion USA Inc. | 5 | $135.93 | |
| PFIZER INC. | 6 | $108.33 | |
| Ardelyx, Inc. | 5 | $103.52 | |
| IRONWOOD PHARMACEUTICALS, INC | 6 | $99.27 | |
| Celgene Corporation | 5 | $95.36 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
985
Patients
333
Total drug cost
$164,654
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Omeprazole | Generic | 302 | 91 | $3,706 |
| Famotidine | Generic | 160 | 47 | $1,508 |
| Pantoprazole Sodium | Generic | 159 | 55 | $2,780 |
| Sutab (Sod Sulf/Pot Chloride/Mag Sulf) | Brand | 84 | 83 | $13,491 |
| Linzess (Linaclotide) | Brand | 54 | 11 | $35,902 |
| Mesalamine | Generic | 30 | 0 | $32,673 |
| Sucralfate | Generic | 28 | 12 | $734 |
| Esomeprazole Magnesium | Generic | 27 | 0 | $1,158 |
| Creon (Lipase/Protease/Amylase) | Brand | 24 | 0 | $54,162 |
| Dexlansoprazole Dr (Dexlansoprazole) | Brand | 24 | 0 | $7,633 |
Hospital affiliations
Frequently asked questions
What is Dr. Alan Chang's medical specialty?
Dr. Alan Chang practices Gastroenterology Physician in Doylestown, PA.
Where does Dr. Alan Chang practice?
Dr. Alan Chang practices at 599 W State St, Doylestown, PA 189012567. Office phone: 2153456050.
What is Dr. Alan Chang's NPI?
Dr. Alan Chang's National Provider Identifier (NPI) is 1912992330, issued by NPPES.
Does Dr. Alan Chang accept Medicare assignment?
Yes. Dr. Alan Chang accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Alan Chang commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99213); Established patient office or other outpatient visit (HCPCS 99214); Biopsy of large bowel using a flexible endoscope (HCPCS 45380). Source: CMS Medicare Physician & Other Practitioners file.