Active NPI 1114911088 Individual Practitioner Female Practitioner

Dr. Mihaela S Stefan , MD

Internal Medicine • Boulder, CO

Professional Overview & Biography Verified Profile Summary

Dr. Mihaela Stefan, MD is a registered healthcare professional specializing in Internal Medicine in Boulder, CO. Practice services are available at 2735 5TH ST under active NPI credentials.

Frequently performed procedures and clinical services include subsequent hospital care with moderate levelof medical decision making, if using time, at least, new patient outpatient office visit, follow-up hospital inpatient care per day. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

2735 5th St

Boulder, CO 803043229

Telephone 5165813013

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in Boulder, CO

Active Practitioner

Practitioner Clinical Experience

Active

City Avg: 24.2 Yrs

State Avg: 23.3 Yrs

Regional Practice Density

77 Specialists

Practicing in Boulder, CO (2124 Statewide)

Telehealth Adoption Rate

31.2% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

56.2% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2022)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	12	12	$240.00	$105.20

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	82	56	$240.00	$106.07
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	78	60	$167.00	$73.80
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	36	36	$380.00	$140.93
99231 Follow-up hospital inpatient care per day, typically 15 minutes	29	21	$90.00	$39.41
99238 Hospital discharge day management, 30 minutes or less	24	24	$169.00	$74.38
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	14	14	$480.00	$179.18
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	13	13	$250.00	$103.21

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	147	98	$163.70	$75.58
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	76	57	$235.11	$108.37
99231 Follow-up hospital inpatient care per day, typically 15 minutes	28	21	$89.25	$41.05
99238 Hospital discharge day management, 30 minutes or less	18	18	$164.33	$76.36
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	17	17	$374.18	$135.80
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	16	16	$312.13	$143.90

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	68	53	$234.00	$107.50
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	57	38	$162.00	$75.24
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	34	34	$456.00	$209.30
99220 Hospital observation care, typically 70 minutes	19	19	$418.00	$191.91
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	14	14	$309.00	$141.67

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	105	73	$162.00	$75.54
99231 Follow-up hospital inpatient care per day, typically 15 minutes	69	53	$89.00	$40.69
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	52	39	$234.00	$108.14
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	43	43	$309.00	$141.97
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	31	31	$456.00	$210.47

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	43	43	$371.00	$168.65
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	39	36	$162.00	$73.79
99231 Follow-up hospital inpatient care per day, typically 15 minutes	31	24	$89.00	$40.08
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	28	28	$466.00	$212.16
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	26	24	$234.00	$106.64
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	15	15	$371.00	$132.40

Medical Specialties & State Licenses

CMS Verified: 2025-04-25

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License CO DR.0074949

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.

Internal Medicine

NUCC Taxonomy Code: 207R00000X

State License MA 223648

Hospitalist

NUCC Taxonomy Code: 208M00000X

State License MA 223648

Hospitalists are physicians whose primary professional focus is the general medical care of hospitalized patients. Their activities include patient care, teaching, research, and leadership related to Hospital Medicine. The term 'hospitalist' refers to physicians whose practice emphasizes providing care for hospitalized patients.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID

110040687A (MA)

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

13 Historical Events

📍

Updated Practice Location April 25, 2025

Registered at 2735 5TH ST, BOULDER, CO 803043229 (Tel: 5165813013)

📍

Updated Business Mailing Address April 25, 2025

Registered at 2735 5TH ST, BOULDER, CO 803043229 (Tel: 5165813013)

✅

NPI Profile Active January 12, 2018

NPI status registered as active in NPPES database

📍

Updated Practice Location January 12, 2018

Registered at 759 CHESTNUT STREET, SPRINGFIELD, MA 011071619 (Tel: 4137946297)

📍

Updated Business Mailing Address January 12, 2018

Registered at 280 CHESTNUT STREET, 2ND FLOOR, SPRINGFIELD, MA 011991001 (Tel: 4137945700)

👤

Provider Name / Credentials Updated January 12, 2018

Recorded as MIHAELA STEFAN, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) January 12, 2018

Internal Medicine (License #223648 in MA)

✅

NPI Profile Active May 19, 2016

NPI status registered as active in NPPES database

📍

Updated Practice Location May 19, 2016

Registered at 759 CHESTNUT STREET, SPRINGFIELD, MA 011071619 (Tel: 4137944320)

📍

Updated Business Mailing Address May 19, 2016

Registered at 280 CHESTNUT STREET, 2ND FLOOR, SPRINGFIELD, MA 011991001 (Tel: 4137945700)

👤

Provider Name / Credentials Updated May 19, 2016

Recorded as MIHAELA STEFAN, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) May 19, 2016

Internal Medicine (License #223648 in MA)

🟢

Initial NPI Registration & Enumeration September 07, 2005

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1114911088

Entity Type:

Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)

Enumeration Date: September 07, 2005

Last Update: April 25, 2025

Sole Proprietor: No

Update or Correct Profile

Mailing Address

2735 5th St

Boulder, CO 803043229

Phone: 5165813013

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).

⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.