Doctor profile · Federal record
Dr. Vallikantha Nellaiappan, M.D
Endocrinology, Diabetes & Metabolism Physician (CMS: Endocrinology) · Internal Medicine Physician · Internal Medicine Physician · Endocrinology, Diabetes & Metabolism Physician · Endocrinology, Diabetes & Metabolism Physician · Greenfield, WI
- NPI 1548557812
- Accepts Medicare
- MIPS 50.0 / 100 · 2023
- 18 yrs in practice
- Licensed in 4 states
- Female
- Group practice
- No sanctions
Practice & contact
Operates at 4 locations .
- Primary practice
-
4448 W Loomis RD
Greenfield, WI 532204800
(414) 281-5150 - Additional location
-
3333 Green Bay RD
North Chicago, IL 600643037
(847) 578-3000 - Additional location
-
800 S Tillotson Ave
Muncie, IN 473044529
(765) 289-5410
fax (765) 281-2085 - Additional location
-
3691 Ridge Mill Dr
Hilliard, OH 430267752
(614) 685-3333
fax (614) 688-9220 - Mailing address
-
Po Box 735044
Chicago, IL 606735044
Show 1 more location
Credentials & registration
- NPI registered
- July 2011 — 15 yrs on file
- Profile last updated
- October 26, 2023
- Year of graduation
- 2008 — 18 yrs since
- Specialty taxonomy
- 207RE0101X — NUCC code
- State licenses (4)
- Wisconsin #101005 · Illinois #125059624 · Ohio #35.139412 · Indiana #01077589A
- Medicaid (2)
- OH #0418021 · WI #100249522
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1548557812. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
206
Distinct HCPCS
7
Medicare allowed
$23,291
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 64 | 63 | $120 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 45 | 45 | $84 | |
99204 |
New patient office or other outpatient visit, 45-59 minutes | 26 | 26 | $158 | |
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 26 | 25 | $166 | |
83036 |
Hemoglobin a1c level | 17 | 15 | $10 | |
99203 |
New patient office or other outpatient visit, 30-44 minutes | 15 | 15 | $106 | |
99222 |
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes | 13 | 13 | $126 |
In context: peer comparison
Among 1 peers in Greenfield Endocrinology, Diabetes & Metabolism Physician, average services per provider: 29. This provider delivers 7.1× the peer median.Open Payments
Industry payments received
All-time total
$20
Transactions
1
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Abbott Laboratories | 1 | $19.98 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
472
Patients
123
Total drug cost
$238,041
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Levothyroxine Sodium | Generic | 91 | 30 | $1,133 |
| Lantus Solostar (Insulin Glargine,Hum.Rec.Anlog) | Brand | 41 | 16 | $32,162 |
| Ozempic (Semaglutide) | Brand | 40 | 13 | $60,415 |
| Alendronate Sodium | Generic | 39 | 19 | $438 |
| Trulicity (Dulaglutide) | Brand | 34 | 12 | $44,605 |
| Methimazole | Generic | 33 | 0 | $291 |
| Jardiance (Empagliflozin) | Brand | 32 | 11 | $28,425 |
| Metformin Hcl | Generic | 32 | 11 | $204 |
| Tradjenta (Linagliptin) | Brand | 24 | 0 | $14,673 |
| Novolog Flexpen (Insulin Aspart) | Brand | 21 | 11 | $34,935 |
Hospital affiliations
Frequently asked questions
What is Dr. Vallikantha Nellaiappan's medical specialty?
Dr. Vallikantha Nellaiappan practices Endocrinology, Diabetes & Metabolism Physician in Greenfield, WI.
Where does Dr. Vallikantha Nellaiappan practice?
Dr. Vallikantha Nellaiappan practices at 4448 W Loomis RD, Greenfield, WI 532204800. Office phone: 4142815150.
What is Dr. Vallikantha Nellaiappan's NPI?
Dr. Vallikantha Nellaiappan's National Provider Identifier (NPI) is 1548557812, issued by NPPES.
Does Dr. Vallikantha Nellaiappan accept Medicare assignment?
Yes. Dr. Vallikantha Nellaiappan accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Vallikantha Nellaiappan 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 99213); New patient office or other outpatient visit (HCPCS 99204). Source: CMS Medicare Physician & Other Practitioners file.