ERIN D UNGER MD
NPI 1366705451
Internal Medicine - Interventional Cardiology in Littleton, CO

Q: What is Erin Unger's NPI number?

The NPI number for Erin Unger is 1366705451. It was assigned to this individual provider in the NPPES registry on June 22, 2012. The provider is also known as Erin Daly Zolnick.

Q: What is Erin Unger's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Interventional Cardiology, with taxonomy code 207RI0011X.

Q: When was this NPI record last updated?

The NPPES record for Erin Unger was last updated on September 11, 2020. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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 June 22, 2012PECOS EnrolledAccepts Medicare Assignment

77.17/100

CMS Quality Rating

1000 SOUTHPARK DR, LITTLETON, CO 80120(303) 744-1065(720) 733-1699 Get Directions Write a Review

NPPES record last updated: September 11, 2020. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Sep 11, 2020, Jul 21, 2020, Jul 15, 2020 (3 updates tracked since 2020).

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About Erin D Unger Md NPPES

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

ERIN D UNGER MD (NPI 1366705451) is an individual interventional cardiology provider in Littleton, Colorado, licensed in Colorado (DR.0063731) and active in the NPI registry since June 2012. She is enrolled in Medicare PECOS, maintains a secondary practice location in Chicago, and is a graduate of Northwestern University Feinberg Medical School (2012).

NPPES Registry Identity

NPI1366705451

Entity TypeIndividualFemale

Primary Taxonomy207RI0011X

Provider Legal NameERIN D UNGERCredential: MD

Location Address1000 SOUTHPARK DRLittleton, CO 80120-5654

Mailing AddressPo Box 801106Kansas City, MO 64180-1106 · (800) 953-0104 · Fax (303) 765-6670

Phone(303) 744-1065

Fax(720) 733-1699

Sole ProprietorNo

Medical School CMSNorthwestern University Feinberg Medical SchoolGraduated 2012

Enumeration DateJune 22, 2012

Last NPPES UpdateSeptember 11, 20203 updates tracked since enumeration

NPPES CertifiedSeptember 11, 2020

✔ NPI 1366705451 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Interventional CardiologyAllopathic & Osteopathic Physicians

Taxonomy Code207RI0011X

License✔ Licensed in CO · DR.0063731

Definition

An area of medicine within the subspecialty of cardiology, which uses specialized imaging and other diagnostic techniques to evaluate blood flow and pressure in the coronary arteries and chambers of the heart and uses technical procedures and medications to treat abnormalities that impair the function of the cardiovascular system.

Also ListedInternal MedicineTaxonomy 207R00000X · License 125061088 (IL)

1000 SOUTHPARK DR, Littleton, CO 80120

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Other Names 1

Former Name (1)Erin Daly Zolnick

Secondary Practice Location 1

Location 1251 E Huron StChicago, IL 60611-2908 · Phone (312) 926-6895

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

Erin D Unger 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 ID345551438

PECOS Enrollment IDI20200916002253

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 Erin Unger reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Portercare Adventist Health System

Same address

Rehabilitation, Cardiac Facilities

1000 SOUTHPARK DR
Littleton, CO 80120

Reassigned Medicare billing, Colorado enrollment
36 clinicians in this Medicare group

NPI 1750832382 (303) 744-1065

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 20

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 moderate level of decision making, if using time, 30 minutes or more 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.

294 services200 patients

Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306

This is a heart ultrasound, also known as an echocardiogram. It uses sound waves to create pictures of your heart, showing how blood flows through it. The color depicts the blood flow's speed and direction. It also checks the heart's valves to ensure they're working properly.

214 services214 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000

An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.

117 services114 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes 99233

Follow-up hospital inpatient care per day typically involves a 35-minute check-up by your healthcare provider. This service includes monitoring your health progress, adjusting your treatment plan if needed, and answering any questions you may have about your condition or care.

75 services42 patients

Ultrasound of heart with color-depicted blood flow, rate, direction and valve function 93306

64 services64 patients

Anticoagulant management of patient taking warfarin 93793

Anticoagulant management with warfarin involves monitoring and adjusting your medication to prevent blood clots while minimizing the risk of bleeding. Regular blood tests measure your response to warfarin, helping adjust your dose if necessary. It's crucial to maintain a consistent diet and promptly report any changes in your health.

63 services24 patients

Intensive cardiac rehabilitation; with or without continuous ecg monitoring with exercise, per session G0422

Intensive cardiac rehabilitation is a program designed to improve heart health after a cardiac event. It may involve monitored exercise sessions, where your heart rate is tracked via ECG to ensure safety. Each session is tailored to your needs and abilities.

60 services37 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.

53 services53 patients

Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional 99211

This service involves an outpatient visit for established patients who may not need direct interaction with a healthcare professional. It could include reviewing test results, monitoring existing conditions, or adjusting treatment plans. It's typically done remotely, ensuring your comfort and convenience.

43 services38 patients

Intensive cardiac rehabilitation; with or without continuous ecg monitoring; without exercise, per session G0423

Intensive cardiac rehabilitation (ICR) is a program designed to improve heart health, especially after a cardiac event. It may include continuous ECG monitoring to track heart activity. Each session, even without exercise, focuses on lifestyle changes, diet, and stress management.

40 services26 patients

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only 93010

A routine electrocardiogram (ECG) with 12 leads is a simple, non-invasive test that records the electrical activity of your heart. It helps in identifying heart conditions by detecting irregularities in your heart rhythms. The results are interpreted and a report is provided.

35 services30 patients

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

29 services21 patients

Ultrasound of heart, follow-up 93308

A follow-up ultrasound of the heart, also known as an echocardiogram, is a non-invasive test that uses sound waves to create images of your heart. It helps doctors monitor your heart's function and structures after initial assessment or treatment.

27 services26 patients

Ultrasound of heart with color-depicted blood flow, rate and valve function 93325

An ultrasound of the heart, also known as an echocardiogram, uses sound waves to create pictures of your heart. It shows the structure, movement, and blood flow within your heart. This helps assess the heart's health and function, including the valves and rate.

15 services15 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.

15 services13 patients

Ultrasound of heart blood flow, valves and chambers, follow-up 93321

This procedure, an echocardiogram, uses sound waves to create images of your heart. It aids in assessing your heart's blood flow, chambers, and valves. It's a follow-up procedure, ensuring that your heart is functioning properly post-treatment.

13 services13 patients

Exercise or drug-induced heart stress test with electrocardiogram (ecg) with review by physician 93018

An exercise or drug-induced heart stress test with ECG is a procedure to assess how your heart functions under stress. It can involve exercising or medication to make your heart work harder while an ECG records its activity. A physician reviews the results.

12 services12 patients

Electrocardiogram (ecg) 2-day continuous with review by health care professional 93227

An Electrocardiogram (ECG) is a test that checks your heart's activity. The 2-day continuous ECG records your heart's rhythm non-stop for 48 hours. It helps to detect irregularities that may not occur during a shorter test. A healthcare professional will review the results to identify any issues.

12 services12 patients

Electrocardiogram (ecg) up to 30 days continuous with symptom monitoring, transmission and review and report by health care professional 93272

An Electrocardiogram (ECG) is a test that records the electrical activity of your heart. For up to 30 days, a device will continuously monitor your heart's rhythm, noting any symptoms. The data is sent to a healthcare professional who reviews it and provides a report on your heart health.

12 services12 patients

Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision by physician 93016

An exercise or drug-induced heart stress test with ECG involves monitoring your heart's activity while it's under stress, either from exercise or medication. A doctor supervises the entire procedure to ensure safety and accuracy in results. This test helps detect heart problems.

11 services11 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 80120 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

$132.55 typical visit price

range $58.06 – $174.82

Typical copayment $33.13 (range $14.51 – $43.70)

Most-billed visit code 99204

Established Patient

$102.03 typical visit price

range $18.88 – $142.79

Typical copayment $25.50 (range $4.72 – $35.69)

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.

77.17/100

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

Scored as part of a group practice

Quality

80.27

Promoting Interoperability

Improvement Activities

Cost

59.47

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.

MRS. KAREN ELAINE KAMERZELL FNP-BC

Nurse Practitioner (Family)