DR. DARA GRENNAN
NPI 1518282938
Internal Medicine - Infectious Disease in Dixon, IL

Q: What is Dara Grennan's NPI number?

The NPI number for Dara Grennan is 1518282938. It was assigned to this individual provider in the NPPES registry on March 29, 2010.

Q: What is Dara Grennan's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Q: When was this NPI record last updated?

The NPPES record for Dara Grennan was last updated on April 26, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years 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.

Active since March 29, 2010PECOS EnrolledAccepts Medicare Assignment

94.1/100

CMS Quality Rating

403 E 1ST ST, DIXON, IL 61021(815) 285-5629(815) 285-5634 Get Directions Write a Review

NPPES record last updated: April 26, 2021. Verified against the NPPES registry weekly; last sync: August 16, 2026.

Record update history: Apr 26, 2021, Aug 3, 2020, Sep 4, 2018 and 1 more (4 updates tracked since 2018).

On this page

About Dr. Dara Grennan NPPES

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

DR. DARA GRENNAN (NPI 1518282938) is an individual infectious disease provider in Dixon, Illinois, licensed in Illinois (036-137502) and active in the NPI registry since March 2010. She is enrolled in Medicare PECOS, is affiliated with John H Stroger Jr Hospital, and is a graduate of Other (2007).

NPPES Registry Identity

NPI1518282938

Entity TypeIndividualFemale

Primary Taxonomy207RI0200X

Provider Legal NameDR. DARA GRENNAN

Location Address403 E 1ST STDixon, IL 61021

Mailing Address680 N Lake Shore DrChicago, IL 60611-4546 · (312) 956-8686

Phone(815) 285-5629

Fax(815) 285-5634

Sole ProprietorNo

Medical School CMSOtherGraduated 2007

Enumeration DateMarch 29, 2010

Last NPPES UpdateApril 26, 20214 updates tracked since enumeration

NPPES CertifiedApril 26, 2021

✔ NPI 1518282938 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyInternal Medicine · Infectious DiseaseAllopathic & Osteopathic Physicians

Taxonomy Code207RI0200X

License✔ Licensed in IL · 036-137502

Definition

An internist who deals with infectious diseases of all types and in all organ systems. Conditions requiring selective use of antibiotics call for this special skill. This physician often diagnoses and treats AIDS patients and patients with fevers which have not been explained. Infectious disease specialists may also have expertise in preventive medicine and travel medicine.

Also ListedInternal MedicineTaxonomy 207R00000X · License 036-137502 (IL)

Also ListedHospitalistTaxonomy 208M00000X · License 36.137502 (IL), 8153445 (UT)

403 E 1ST ST, Dixon, IL 61021

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Other Identifiers 2

Medicaid036137502IL

OtherF400440732IL · Medicare Ptan

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Ambetter from Home State Health, Ambetter Health, Ambetter Health of Delaware.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

Dr. Dara Grennan 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 ID6507092962

PECOS Enrollment IDI20171107000107

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 2

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.

18 services13 patients

Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes 99222

Initial hospital inpatient care is a service where a healthcare provider spends about 50 minutes per day overseeing your care while you're admitted in the hospital. This includes reviewing your health status, planning your treatment, and ensuring your safety and comfort.

16 services16 patients

Hospital Affiliations CMS Care Compare

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

John H Stroger Jr Hospital

Acute Care Hospitals · Chicago, IL

2/5 CMS rating

OwnershipGovernment - Local

CMS Certification Number140124

Location1901 W Harrison StChicago, IL 60612 · Cook County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 61021 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.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

94.1/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored through an Alternative Payment Model

Quality

82.59

Promoting Interoperability

100

Improvement Activities

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.

SAAD BLANEY M.D.

Pathology (Anatomic Pathology & Clinical Pathology)

403 E 1ST ST
DIXON, IL 61021

Lee County (815) 285-5533

KATHERINE SHAW BETHEA HOSPITAL

Psychiatric Unit

403 E 1ST ST
DIXON, IL 61021

Lee County (815) 288-5531

BRETT AUSTIN MCGOWAN M.D.

Obstetrics & Gynecology

403 E 1ST ST
DIXON, IL 61021

Lee County (815) 285-5461

MARIE NOWAK MD

Emergency Medicine

403 E 1ST ST
DIXON, IL 61021

Lee County (815) 288-5531

STACEY PENAFLOR

Physical Therapist

403 E 1ST ST
DIXON, IL 61021

Lee County (815) 285-5591

DOROTHY BENNETT MD

Internal Medicine

403 E 1ST ST
DIXON, IL 61021

Lee County (815) 285-5629

VALARIE PFOUTZ APN

Nurse Practitioner (Family)

403 E 1ST ST
DIXON, IL 61021

Lee County (815) 288-5531

AUDRA DANIELLE WASHO APN

Nurse Practitioner (Family)

403 E 1ST ST
DIXON, IL 61021

Lee County (815) 284-5710

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 Dara Grennan's NPI number?

The NPI number for Dara Grennan is 1518282938. It was assigned to this individual provider in the NPPES registry on March 29, 2010.

Where is Dara Grennan located?

Dara Grennan practices at 403 E 1st St, Dixon, IL 61021. The listed phone number is (815) 285-5629.

What is Dara Grennan's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Infectious Disease, with taxonomy code 207RI0200X.

Is Dara Grennan enrolled in Medicare?

Yes. Dara Grennan 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 Dara Grennan accept?

Health plans from Ambetter Health, Ambetter Health of Delaware and Ambetter from Home State Health list Dara Grennan 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 Dara Grennan affiliated with any hospitals?

According to CMS data, Dara Grennan is affiliated with John H Stroger Jr Hospital.

When was this NPI record last updated?

The NPPES record for Dara Grennan was last updated on April 26, 2021. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 5 years 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.