JAMBUNATHAN MAHADEVAN MD
NPI 1669588638
Internal Medicine in St Louis, MO

Active since August 22, 2006PECOS EnrolledAccepts Medicare Assignment
3535 S JEFFERSON AVE, SUITE 304, ST LOUIS, MO 63118(314) 865-6585(314) 865-6599 Get Directions Write a Review

NPPES record last updated: August 5, 2010. Verified against the NPPES registry weekly; last sync: July 26, 2026.

About Jambunathan Mahadevan Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JAMBUNATHAN MAHADEVAN MD (NPI 1669588638) is an individual internal medicine provider in St Louis, Missouri, licensed in Missouri (R7375) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS, is affiliated with Mercy Hospital South, and is a graduate of Other (1971).

NPPES Registry Identity

NPI1669588638
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameJAMBUNATHAN MAHADEVANCredential: MD
Location Address3535 S JEFFERSON AVE, SUITE 304St Louis, MO 63118
Mailing AddressPo Box 775578St Louis, MO 63177-5578 · (314) 865-6582 · Fax (314) 865-6599
Fax(314) 865-6599
Sole ProprietorNo
Medical School CMSOtherGraduated 1971
Enumeration DateAugust 22, 2006
Last NPPES UpdateAugust 5, 2010
NPI 1669588638 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License Licensed in MO · R7375
Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

3535 S JEFFERSON AVE, St Louis, MO 63118

Other Names 1

Other Name (5)Jay Mahadevan Md

Other Identifiers 5

Medicare UPINA23972
Other100656MO · Blue Shield
Medicare ID-Type Unspecified000001011MO
Other0400415MO · Uhc
Medicaid201582608MO

Accepted Insurance

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Jambunathan Mahadevan Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID1456476043
PECOS Enrollment IDI20100920000972
Eligible to Order & Refer Part B Labs & Imaging Durable Medical Equipment Home Health Agency Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Areas of Expertise CMS Part B claims 5

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Established patient office or other outpatient visit, 20-29 minutes 99213
This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.
351 services71 patients
Blood glucose (sugar) test performed by hand-held instrument 82962
A blood glucose test uses a handheld device to measure the amount of sugar in your blood. A small prick on your finger allows a drop of blood to be placed on a test strip, which is then read by the device. This helps monitor and manage diabetes effectively.
285 services61 patients
Insertion of needle into vein for collection of blood sample 36415
This procedure involves inserting a small needle into a vein, typically in your arm, to collect a blood sample. It's a quick and simple process to help diagnose or monitor health conditions. You may feel a small prick, but discomfort is minimal.
129 services70 patients
Established patient office or other outpatient visit, 30-39 minutes 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
60 services42 patients
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit G0439
An annual wellness visit is a yearly appointment with your primary care provider to create or update a personalized prevention plan. This plan helps prevent illness based on your current health and risk factors. It's a subsequent visit, meaning it follows an initial assessment.
56 services56 patients

Hospital Affiliations CMS Care Compare 2

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Mercy Hospital South

Acute Care Hospitals · Saint Louis, MO
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260077
Location10010 Kennerly RoadSaint Louis, MO 63128 · St. Louis County
Emergency services

Ssm Health St Mary's Hospital - St Louis

Acute Care Hospitals · Richmond Heights, MO
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number260091
Location6420 Clayton RdRichmond Heights, MO 63117 · St. Louis County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 63118 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$128.28 typical visit price
range $55.65 – $169.38
Typical copayment $32.07 (range $13.91 – $42.34)
Most-billed visit code 99204
Established Patient
$98.37 typical visit price
range $17.76 – $137.92
Typical copayment $24.59 (range $4.44 – $34.48)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Referred Medical Equipment & Supplies CMS DME claims 2

Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.

Blood glucose test or reagent strips for home blood glucose monitor, per 50 strips A4253
DME-Other DME · category DE017N
6 suppliers14 claims43 services$6.25 avg. paid by Medicare
Lancets, per box of 100 A4259
DME-Medical/Surgical Supplies · category DA000N
7 suppliers12 claims18 services$0.95 avg. paid by Medicare
Dollar amounts are the average Medicare paid the supplier per service. They are not the cost to the patient.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

Surgery
3535 S JEFFERSON AVE, #201
SAINT LOUIS, MO 63118
Specialist
3535 S JEFFERSON AVE, STE 101
SAINT LOUIS, MO 63118
Optometrist
3535 S JEFFERSON AVE, SUITE S7
SAINT LOUIS, MO 63118
Internal Medicine
3535 S JEFFERSON AVE, SUITE 304
ST LOUIS, MO 63118
Nurse Practitioner
3535 S JEFFERSON AVE, SUITE 104
SAINT LOUIS, MO 63118
Dentist (General Practice)
3535 S JEFFERSON AVE
SAINT LOUIS, MO 63118
Surgery
3535 S JEFFERSON AVE
SAINT LOUIS, MO 63118
Family Medicine
3535 S JEFFERSON AVE, SUITE 314
SAINT LOUIS, MO 63118

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Jambunathan Mahadevan's NPI number?

The NPI number for Jambunathan Mahadevan is 1669588638. It was assigned to this individual provider in the NPPES registry on August 22, 2006. The provider is also known as Jay Mahadevan MD.

Where is Jambunathan Mahadevan located?

Jambunathan Mahadevan practices at 3535 S Jefferson Ave Suite 304, St Louis, MO 63118. The listed phone number is (314) 865-6585.

What is Jambunathan Mahadevan's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Jambunathan Mahadevan enrolled in Medicare?

Yes. Jambunathan Mahadevan is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

What insurance does Jambunathan Mahadevan accept?

Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Arkansas Health & Wellness, Ambetter from Home State Health and Ambetter from Sunflower Health Plan and 4 other insurers list Jambunathan Mahadevan as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

Is Jambunathan Mahadevan affiliated with any hospitals?

According to CMS data, Jambunathan Mahadevan is affiliated with Mercy Hospital South and Ssm Health St Mary's Hospital - St Louis.

When was this NPI record last updated?

The NPPES record for Jambunathan Mahadevan was last updated on August 5, 2010. NPI Profile syncs with the weekly NPPES data releases published by CMS.