Doctor profile · Federal record
Dr. Ranjani Ramanathan, MD
Endocrinology, Diabetes & Metabolism Physician (CMS: Endocrinology) · Internal Medicine Physician · Saint Peters, MO
- NPI 1639212335
- Accepts Medicare
- 24 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
201 Bjc Saint Peters Dr Ste 100
Saint Peters, MO 633763386
(636) 916-7235
fax (636) 916-9850 - Additional location
-
201 Bjc Saint Peters Dr Ste 200
Saint Peters, MO 633763386
(636) 916-9615
Credentials & registration
- NPI registered
- February 2007 — 19 yrs on file
- Profile last updated
- September 25, 2025
- Year of graduation
- 2002 — 24 yrs since
- Specialty taxonomy
- 207RE0101X — NUCC code
- State license (1)
- Missouri #2007022069
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1639212335. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
525
Distinct HCPCS
7
Medicare allowed
$48,605
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 238 | 158 | $121 | |
99232 |
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | 96 | 36 | $77 | |
83036 |
Hemoglobin a1c level | 65 | 53 | $10 | |
95251 |
Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report | 63 | 38 | $33 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 30 | 24 | $170 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 21 | 21 | $122 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 12 | 12 | $162 |
In context: peer comparison
Among 2 peers in this city , average services per provider: 106. This provider delivers 5.0× the peer median.Open Payments
Industry payments received
All-time total
$1,300
Transactions
60
Manufacturers
15
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Medtronic, Inc. | 3 | $203.01 | |
| Novo Nordisk Inc | 12 | $157.14 | |
| Lilly USA, LLC | 9 | $138.91 | |
| Amgen Inc. | 6 | $107.40 | |
| SANOFI-AVENTIS U.S. LLC | 1 | $103.82 | |
| Corcept Therapeutics | 4 | $74.40 | |
| BETA BIONICS, INC. | 7 | $74.09 | |
| Dexcom, Inc. | 3 | $59.21 | |
| IBSA Pharma Inc. | 3 | $55.02 | |
| Mannkind Corporation | 3 | $52.30 | |
| Radius Health, Inc. | 2 | $44.97 | |
| Insulet Corporation | 2 | $36.27 | |
| AstraZeneca Pharmaceuticals LP | 2 | $32.40 | |
| Novartis Pharmaceuticals Corporation | 2 | $30.94 | |
| Amphastar Pharmaceuticals, Inc. | 1 | $23.11 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
2,003
Patients
608
Total drug cost
$833,062
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Levothyroxine Sodium | Generic | 310 | 83 | $5,093 |
| Glipizide | Generic | 225 | 71 | $2,793 |
| Metformin Hcl Er (Metformin Hcl) | Brand | 214 | 72 | $4,213 |
| Ozempic (Semaglutide) | Brand | 162 | 40 | $252,043 |
| Atorvastatin Calcium | Generic | 130 | 44 | $2,392 |
| Glimepiride | Generic | 122 | 44 | $2,110 |
| Metformin Hcl | Generic | 116 | 41 | $1,023 |
| Lantus Solostar (Insulin Glargine,hum.Rec.Anlog) | Brand | 109 | 44 | $76,465 |
| Mounjaro (Tirzepatide) | Brand | 109 | 23 | $138,132 |
| Trulicity (Dulaglutide) | Brand | 107 | 26 | $153,921 |
Hospital affiliations
Frequently asked questions
What is Dr. Ranjani Ramanathan's medical specialty?
Dr. Ranjani Ramanathan practices Endocrinology, Diabetes & Metabolism Physician in Saint Peters, MO.
Where does Dr. Ranjani Ramanathan practice?
Dr. Ranjani Ramanathan practices at 201 Bjc Saint Peters Dr Ste 100, Saint Peters, MO 633763386. Office phone: 6369167235.
What is Dr. Ranjani Ramanathan's NPI?
Dr. Ranjani Ramanathan's National Provider Identifier (NPI) is 1639212335, issued by NPPES.
Does Dr. Ranjani Ramanathan accept Medicare assignment?
Yes. Dr. Ranjani Ramanathan accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Ranjani Ramanathan commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Subsequent hospital care with moderate levelof medical decision making (HCPCS 99232); Hemoglobin a1c level (HCPCS 83036). Source: CMS Medicare Physician & Other Practitioners file.