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PRATHAYINI SUBARAJAN DO
NPI 1306308671
Internal Medicine - Endocrinology, Diabetes & Metabolism in Huntley, IL

Active since April 04, 2019PECOS EnrolledAccepts Medicare Assignment
10370 HALIGUS RD STE 117, HUNTLEY, IL 60142(815) 344-3900(847) 802-7207 Get Directions Write a Review

NPPES record last updated: June 10, 2026. Verified against the NPPES registry weekly; last sync: October 25, 2026.

Record update history: Jul 9, 2024, Apr 4, 2019 (2 updates tracked since 2019).

About Prathayini Subarajan Do NPPES

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

PRATHAYINI SUBARAJAN DO (NPI 1306308671) is an individual endocrinology, diabetes & metabolism provider in Huntley, Illinois, licensed in Illinois (036160677) and active in the NPI registry since April 2019. She is enrolled in Medicare PECOS, is affiliated with Loyola Gottlieb Memorial Hospital, and maintains a secondary practice location in Crystal Lake.

NPPES Registry Identity

NPI1306308671
Entity TypeIndividualFemale
Primary Taxonomy207RE0101X
Provider Legal NamePRATHAYINI SUBARAJANCredential: DO
Location Address10370 HALIGUS RD STE 117Huntley, IL 60142-9582
Mailing Address10370 Haligus Rd Ste 117Huntley, IL 60142-9582 · (815) 344-3900 · Fax (847) 802-7207
Phone(815) 344-3900
Fax(847) 802-7207
Sole ProprietorNo
Medical School CMSOhio University, College Of Osteopathic MedicineGraduated 2019
Enumeration DateApril 4, 2019
Last NPPES UpdateJune 10, 20262 updates tracked since enumeration
NPPES CertifiedJune 10, 2026
✔ NPI 1306308671 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Endocrinology, Diabetes & MetabolismAllopathic & Osteopathic Physicians
Taxonomy Code207RE0101X
License✔ Licensed in IL · 036160677
Definition
An internist who concentrates on disorders of the internal (endocrine) glands such as the thyroid and adrenal glands. This specialist also deals with disorders such as diabetes, metabolic and nutritional disorders, obesity, pituitary diseases and menstrual and sexual problems.
Also ListedInternal MedicineTaxonomy 207R00000X · License 036160677 (IL)
10370 HALIGUS RD STE 117, Huntley, IL 60142
Open in Google Maps ↗

Secondary Practice Location 1

Location 1360 Station Dr Ste 300Crystal Lake, IL 60014-8003 · Phone (815) 344-3900 · Fax (815) 356-2388

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Prathayini Subarajan Do 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 ID6507191814
PECOS Enrollment IDI20240904002714
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.

Medicare Billing Reassignment

Medicare enrollment records show Prathayini Subarajan reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Central Dupage Physician Group
28 mi
Family Medicine
5777 DEPARTMENT
Carol Stream, IL 60122
  • Reassigned Medicare billing, Illinois enrollment
  • 1,664 clinicians in this Medicare group
NPI 1033149844 (630) 933-3300

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 4

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 with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
17 services15 patients
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204
This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.
14 services14 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
13 services13 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
12 services11 patients

Hospital Affiliations CMS Care Compare 5

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

Loyola Gottlieb Memorial Hospital

Acute Care Hospitals · Melrose Park, IL
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140008
Location701 West North AveMelrose Park, IL 60160 · Cook County
Emergency services

Macneal Hospital

Acute Care Hospitals · Berwyn, IL
2/5 CMS rating
OwnershipProprietary
CMS Certification Number140054
Location3249 South Oak Park AvenueBerwyn, IL 60402 · Cook County
Emergency services Birthing friendly

Northwestern Medicine Mchenry

Acute Care Hospitals · Mchenry, IL
5/5 CMS rating
OwnershipVoluntary non-profit - Other
CMS Certification Number140116
Location4201 Medical Center DriveMchenry, IL 60050 · Mc Henry County
Emergency services Birthing friendly

Northwestern Medicine Central Dupage Hospital

Acute Care Hospitals · Winfield, IL
5/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140242
Location25 North Winfield RoadWinfield, IL 60190 · Du Page County
Emergency services Birthing friendly

Loyola University Medical Center

Acute Care Hospitals · Maywood, IL
3/5 CMS rating
OwnershipVoluntary non-profit - Private
CMS Certification Number140276
Location2160 S 1st AvenueMaywood, IL 60153 · Cook County
Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60142 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
$127.46 typical visit price
range $54.80 – $168.44
Typical copayment $31.86 (range $13.70 – $42.11)
Most-billed visit code 99204
Established Patient
$97.25 typical visit price
range $17.16 – $136.56
Typical copayment $24.31 (range $4.29 – $34.14)
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.

Other Providers at the Same Location NPPES 2

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

DR. JYOTHI GOGINENI M.D.
Internal Medicine (Endocrinology, Diabetes & Metabolism)
10370 HALIGUS RD STE 117
HUNTLEY, IL 60142
McHenry County (815) 338-6600
DR. TEJAL UDAY SHAH M.D.
Internal Medicine (Endocrinology, Diabetes & Metabolism)
10370 HALIGUS RD STE 117
HUNTLEY, IL 60142
McHenry County (815) 344-3900

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 Prathayini Subarajan's NPI number?

The NPI number for Prathayini Subarajan is 1306308671. It was assigned to this individual provider in the NPPES registry on April 4, 2019.

Where is Prathayini Subarajan located?

Prathayini Subarajan practices at 10370 Haligus Rd Ste 117, Huntley, IL 60142. The listed phone number is (815) 344-3900.

What is Prathayini Subarajan's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Endocrinology, Diabetes & Metabolism, with taxonomy code 207RE0101X.

Is Prathayini Subarajan enrolled in Medicare?

Yes. Prathayini Subarajan 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.

Which organization bills Medicare for Prathayini Subarajan's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Prathayini Subarajan reassigns Medicare benefits to Central Dupage Physician Group (Carol Stream, IL). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Prathayini Subarajan's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

Is Prathayini Subarajan affiliated with any hospitals?

According to CMS data, Prathayini Subarajan is affiliated with Loyola Gottlieb Memorial Hospital, Macneal Hospital, Northwestern Medicine Mchenry, Northwestern Medicine Central Dupage Hospital and Loyola University Medical Center.

When was this NPI record last updated?

The NPPES record for Prathayini Subarajan was last updated on June 10, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.