Vallikantha Nellaiappan, M.D
Endocrinology, Diabetes & Metabolism Physician · Greenfield, WI
Vallikantha Nellaiappan, M.D is an endocrinology, diabetes & metabolism physician with a practice address in Greenfield, Wisconsin, and NPI 1548557812, issued on Jul 6, 2011. Check the license (Wisconsin 101005, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Vallikantha Nellaiappan
- Credential
- M.D
- Primary taxonomy
- Endocrinology, Diabetes & Metabolism Physician 207RE0101X
- License numbers
- 101005 WI
125059624 IL
01077589A IN
35.139412 OH
Self-reported in NPPES; status is on the state search - Practice location
- 4448 W Loomis RD, Greenfield, WI 53220
- Phone
- (414) 281-5150
- Enumerated
- Jul 6, 2011
- Record last updated
- Oct 26, 2023
- Medicaid IDs
- 0418021 OH
100249522 WI - Medicare enrollment
- Enrolled (PECOS I20230918002859); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest endocrinology, diabetes & metabolism physician records → All 187 in Wisconsin → Look up another NPI →
Also registered at 4448 W Loomis RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Linda Barbian, M.S., CCC-AAudiologist1548336027
- Julian Cammarano, D.O.Family Medicine Physician1285165118
- Amanda Carlson, DNP, FNP-BCNurse Practitioner1114597168
- Barbara Cortes, PTPhysical Therapist1740325216
- Austyn EricksonRegistered Dietitian1073189064
- Megan Gildersleeve, PA-CPhysician Assistant1871270744
Verify Vallikantha Nellaiappan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 101005Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
53% fewer Medicare Part D claims than the average endocrinology, diabetes & metabolism physician in 2024
1,244 Medicare Part D claims for 296 beneficiaries, against an average of 2,630 among the 8,223 providers of this specialty who prescribed in Part D. Brand-name drugs were 60% of claims.
Most prescribed
- Levothyroxine Sodium113 claims
- Alendronate Sodium106 claims
- Ozempic79 claims
- Jardiance76 claims
- Insulin Lispro Kwikpen U-10067 claims
- Lantus Solostar62 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The practice group's MIPS final score for 2023 (Medicare payment program): 51.2 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $19.98
1 payment: long term medical supply or device loan; the largest payer was Abbott Laboratories. The 5,661 providers of this specialty with any payment received $5,742.15 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 3 group practices
- Aurora Advanced Healthcare, Inc.Wauwatosa, WI
- Aurora Medical Group, Inc.Milwaukee, WI
- Lakeshore Medical Clinic LLCGreenfield, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Vallikantha Nellaiappan among 187 endocrinology, diabetes & metabolism physician records in Wisconsin
Vallikantha Nellaiappan, M.D is one of 187 endocrinology, diabetes & metabolism physician records with a practice address in Wisconsin. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2011, is newer than 65% of them.
- NPI issued2011 · 65% of these records are older, 32% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 72% of these records are
- Graduated2008 · median 2003 among the 134 with a school on file
- Record last updated2023 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RE0101X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Endocrinology, Diabetes & Metabolism Physician providers in Wisconsin
There are 187 endocrinology, diabetes & metabolism physician records in Wisconsin.
All 187 in Wisconsin → Every provider in Greenfield → Endocrinology, Diabetes & Metabolism Physician nationwide →
The 8 endocrinology, diabetes & metabolism physician records with the nearest ZIP codes
- Hak-Joong Kim, M.D.Milwaukee, WI 532191306906664
- Anu Verma, MDWauwatosa, WI 532221801107560
- Nasvin Imamudeen, MDMilwaukee, WI 532231225521412
- Elizabeth BartMilwaukee, WI 532151952757809
- Anil Chandel, MDMilwaukee, WI 532151194968313
- Syed Gardezi, MDMilwaukee, WI 532151689626574
- Margaret Gladysz, MDMilwaukee, WI 532151366516312
- Syed Basit Haider, MBBSMilwaukee, WI 532151134879034
Common questions
What is Vallikantha Nellaiappan, M.D's NPI number?
Vallikantha Nellaiappan, M.D's National Provider Identifier (NPI) is 1548557812, issued on Jul 6, 2011. An NPI identifies a provider in billing; it is not a license.
Where is Vallikantha Nellaiappan, M.D located?
The NPPES record lists a practice address at 4448 W Loomis RD, Greenfield, WI, 53220. Phone: (414) 281-5150. Providers update this record themselves, so call before visiting.
How can I verify Vallikantha Nellaiappan, M.D's license?
NPPES lists Wisconsin license number 101005, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Vallikantha Nellaiappan, M.D prescribe under Medicare Part D?
In 2024, Vallikantha Nellaiappan, M.D had 1,244 Medicare Part D claims for 296 beneficiaries; the average among endocrinology, diabetes & metabolism physician prescribers was 2,630. Part D covers Medicare prescriptions only.
What is Vallikantha Nellaiappan, M.D's MIPS final score?
The 2023 MIPS final score is 51.2 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.