DR. KAREN JOY SUNDBY M.D.
NPI 1912977083
Dermatology - MOHS-Micrographic Surgery in Denver, CO

Q: What is Karen Sundby's NPI number?

The NPI number for Karen Sundby is 1912977083. It was assigned to this individual provider in the NPPES registry on January 23, 2006. The provider is also known as Dr. Karen Joy Johnson M.D..

Q: What is Karen Sundby's specialty?

The primary specialty registered for this NPI is Dermatology, specializing in MOHS-Micrographic Surgery, with taxonomy code 207ND0101X.

Q: When was this NPI record last updated?

The NPPES record for Karen Sundby was last updated on May 6, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.

Active since January 23, 2006PECOS EnrolledAccepts Medicare Assignment

100/100

CMS Quality Rating

4700 HALE PKWY, SUITE 140, DENVER, CO 80220(303) 388-8807(720) 360-0181 Get Directions Write a Review

NPPES record last updated: May 6, 2025. Verified against the NPPES registry weekly; last sync: July 26, 2026.

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About Dr. Karen Joy Sundby M.d. NPPES

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

DR. KAREN JOY SUNDBY M.D. (NPI 1912977083) is an individual mohs-micrographic surgery provider in Denver, Colorado, licensed in Colorado (41658) and active in the NPI registry since January 2006. She is enrolled in Medicare PECOS and is a graduate of University Of Colorado School Of Medicine, Denver (2000).

NPPES Registry Identity

NPI1912977083

Entity TypeIndividualFemale

Primary Taxonomy207ND0101X

Provider Legal NameDR. KAREN JOY SUNDBYCredential: M.D.

Location Address4700 HALE PKWY, SUITE 140Denver, CO 80220-4050

Mailing Address4700 Hale Pkwy, Suite 140Denver, CO 80220-4050 · (303) 388-8807 · Fax (720) 360-0181

Phone(303) 388-8807

Fax(720) 360-0181

Sole ProprietorYes

Medical School CMSUniversity Of Colorado School Of Medicine, DenverGraduated 2000

Enumeration DateJanuary 23, 2006

Last NPPES UpdateMay 6, 2025

NPPES CertifiedMay 6, 2025

✔ NPI 1912977083 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyDermatology · MOHS-Micrographic SurgeryAllopathic & Osteopathic Physicians

Taxonomy Code207ND0101X

License✔ Licensed in CO · 41658

Definition

The highly-trained surgeons that perform Mohs Micrographic Surgery are specialists both in dermatology and pathology. With their extensive knowledge of the skin and unique pathological skills, they are able to remove only diseased tissue, preserving healthy tissue and minimizing the cosmetic impact of the surgery. Mohs surgeons who belong to the American College of Mohs Surgery (ACMS) have completed a minimum of one year of fellowship training at one of the ACMS-approved training centers in the U.S.

4700 HALE PKWY, Denver, CO 80220

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Other Names 1

Former Name (1)Dr. Karen Joy Johnson M.d.

Other Identifiers 1

OtherP00332354CO · Rr Ptan

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include UnitedHealthcare.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. Karen Joy Sundby M.d. 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 ID6507893823

PECOS Enrollment IDI20060417000173

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 35

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.

Destruction of precancer skin growth, 2-14 growths 17003

This procedure involves removing 2-14 precancerous skin growths. The growths are treated to prevent them from potentially developing into skin cancer. The process is safe, with minimal discomfort, and promotes healthier skin.

1,548 services236 patients

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.

897 services571 patients

Removal and microscopic exam of growth of head, neck, hands, feet, or genitals, 1-5 tissue blocks 17311

This procedure involves the careful removal of a growth from the head, neck, hands, or feet. The removed tissue, divided into 1-5 blocks, is then examined under a microscope to study its characteristics and determine the nature of the growth.

589 services499 patients

Destruction of precancer skin growth, 1 growth 17000

"Destruction of precancer skin growth" is a procedure that eliminates a single precancerous skin growth. This is done to prevent it from developing into skin cancer. The growth may be removed using various methods such as cryotherapy (freezing), laser therapy, or topical medications.

449 services332 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 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.

428 services323 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.

374 services374 patients

Complicated repair of wound of forehead, cheeks, chin, mouth, neck, underarms, genitals, hands, or feet, 2.6-7.5 cm 13132

This procedure involves the complex repair of a wound in areas like the forehead, cheeks, chin, mouth, neck, underarms, hands, or feet. The wound size ranges from 2.6-7.5 cm. The process includes cleaning, removing damaged tissue, and stitching the wound for proper healing.

291 services259 patients

Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

288 services243 patients

Biopsy of related skin growth, first growth 11102

A biopsy of a skin growth involves taking a small sample of the growth to examine it under a microscope. This helps determine if the growth is harmful. The procedure is typically quick, with minimal discomfort. It's a crucial step in ensuring your skin's health.

278 services220 patients

Injection, triamcinolone acetonide, not otherwise specified, 10 mg J3301

Triamcinolone acetonide is a medication used to reduce inflammation in the body. It's given as a 10 mg injection for conditions like allergies, arthritis, or skin problems. The injection helps to decrease swelling, redness, and itching.

225 services60 patients

Removal and microscopic exam of growth of head, neck, hands, feet, or genitals, each additional stage, 1-5 tissue blocks 17312

This procedure involves the careful removal of abnormal growths from the head, neck, hands, or feet. The removed tissues, divided into 1-5 blocks, are then examined under a microscope to identify any irregularities. The process may be carried out in multiple stages for thorough examination.

213 services172 patients

Destruction of precancer skin growth, 15 or more growths 17004

This procedure involves removing 15 or more precancerous skin growths to prevent them from developing into cancer. It's done using various methods like freezing, creams, or minor surgery. The goal is to protect your health by stopping cancer before it starts.

116 services76 patients

Removal and microscopic exam of growth of trunk, arms, or legs, 1-5 tissue blocks 17313

This procedure involves the removal of a growth from your trunk, arms, or legs. The removed tissue, divided into 1-5 blocks, is then examined under a microscope to identify any abnormalities. This helps in diagnosing and planning further treatment.

111 services94 patients

Complicated repair of wound of scalp, arms, or legs, 2.6-7.5 cm 13121

This is a procedure to repair a complex wound on your scalp, arm, or leg that is 2.6-7.5 cm long. It involves cleaning, removing damaged tissue, and stitching the wound to promote healing. It's performed under local or general anesthesia.

88 services83 patients

Special stained specimen slides to examine tissue, initial procedure 88342

This procedure involves the use of specially stained slides to examine tissue samples. The initial process involves obtaining a small tissue sample from your body. This sample is then placed on a slide and stained with special dyes to highlight different structures and elements. The stained slide is then examined under a microscope to help diagnose any potential health issues.

86 services65 patients

Injection into skin growth, 1-7 growths 11900

This procedure involves injecting medication into 1-7 skin growths. The medication helps to reduce the size of the growths or completely eliminate them. It's a simple, quick, and usually painless process performed by a medical professional.

82 services60 patients

Complicated repair of wound of eyelids, nose, ears, or lip, 2.6-7.5 cm 13152

This procedure involves repairing a wound on your eyelids, nose, ears, or lip that is between 2.6 and 7.5 cm long. It's considered complicated due to the location and size. The doctor will clean, treat, and stitch the wound to promote healing.

74 services71 patients

Removal and microscopic exam of growth, each additional block after 5 tissue blocks 17315

This procedure involves the removal of a growth for further examination. After the initial 5 tissue blocks, each additional block is examined under a microscope. This helps identify the nature of the growth and aids in determining the best course of treatment.

74 services16 patients

Pathology examination of specimen during surgery, first tissue block 88331

A pathology examination during surgery involves the immediate analysis of a removed tissue sample. This helps the surgeon make decisions during your operation. The "first tissue block" refers to the initial sample examined. It's a vital step to ensure your health.

72 services55 patients

Biopsy of related skin growth, each additional growth 11103

A biopsy of related skin growth is a procedure where a small piece of skin growth is removed for testing. If additional growths are identified, they may also be biopsied. This helps in diagnosing skin conditions and planning appropriate treatment.

71 services48 patients

Destruction of skin growth, 1-14 growths 17110

"Destruction of skin growth" refers to a procedure where 1-14 abnormal skin growths are removed. This is done using methods such as freezing, burning, or laser therapy. It helps prevent the growth from causing discomfort or turning into a more serious condition.

71 services69 patients

Repair of wound of eyelids, nose, ears, or lips by transferring skin, 10.1-30.0 sq cm 14061

This procedure involves repairing a wound on the eyelids, nose, ears, or lips by transferring skin from another part of the body. The size of the skin transferred will be between 10.1 to 30.0 square centimeters. It is performed to restore function and appearance.

45 services45 patients

Removal of tissue from wound, 20.0 sq cm or less 97597

This procedure involves the careful removal of damaged or infected tissue from a wound that's 20.0 square cm or less. It's done to promote healing and prevent further infection. The process is carried out under local anesthesia, ensuring minimal discomfort.

40 services30 patients

Removal of cancer skin growth of body, arms, or legs, 1.1-2.0 cm 11602

This procedure involves the surgical removal of a cancerous skin growth on the body, arms, or legs. The growth is between 1.1 and 2.0 cm in size. The goal is to eliminate cancer cells and prevent them from spreading to other parts of the body.

30 services28 patients

Complicated repair of wound of trunk, 2.6-7.5 cm 13101

This service involves the intricate repair of a wound on your body's main structure, between your neck and limbs. The wound measures 2.6-7.5 cm. The procedure includes deep-layer stitching and may involve repairing damaged tissue.

29 services24 patients

Complicated repair of wound of forehead, cheeks, chin, mouth, neck, underarms, genitals, hands, or feet, each additional 5.0 cm or less 13133

This procedure involves a complex repair of a wound on specified body parts. The wound is meticulously cleaned and stitched, ensuring minimal scarring. Each additional 5.0 cm or less of wound repaired requires extra care and precision.

29 services26 patients

Repair of wound by transferring skin, 30.1-60.0 sq cm 14301

This procedure involves repairing a wound by moving healthy skin from one area of the body to the wound site. The transferred skin, measuring between 30.1-60.0 square cm, aids in healing and reduces scarring.

28 services27 patients

Biopsy of ear 69100

A biopsy of the ear is a medical procedure where a small sample of tissue is taken from your ear for examination. This helps doctors diagnose any abnormalities or diseases. It's a simple process, usually done under local anesthesia, and has minimal risks.

27 services24 patients

Removal and microscopic exam of growth of trunk, arms, or legs, each additional stage, 1-5 tissue blocks 17314

This procedure involves removing growths from the trunk, arms, or legs. The removed tissues, divided into 1-5 blocks, are then examined under a microscope to identify any abnormalities. This aids in diagnosing and treating your condition effectively.

26 services22 patients

Full thickness skin graft to nose, ears, eyelids, or lips, 20.0 sq cm or less 15260

A full thickness skin graft is a procedure where a layer of skin is taken from one area of the body and transplanted to another. If it's done on the nose, ears, eyelids, or lips, it helps restore these areas when damaged. The size of the graft is 20.0 sq cm or less.

20 services20 patients

Complicated repair of wound of scalp, arms, or legs, each additional 5.0 cm or less 13122

This procedure involves the complex repair of a wound on the scalp, arms, or legs. It's more intricate than a regular wound repair, often involving layered sutures, debridement, and tissue rearrangement. The service covers each additional wound up to 5.0 cm in length.

18 services15 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

18 services18 patients

Removal of cancer skin growth of body, arms, or legs, 2.1-3.0 cm 11603

This procedure involves the removal of a cancerous skin growth, between 2.1 and 3.0 cm, from the body, arms, or legs. The area is numbed, then the growth is carefully cut out. The goal is to eliminate all cancer cells while minimizing scarring.

16 services14 patients

Dermabrasion of skin of part of face 15781

Dermabrasion is a procedure that refines the top layers of your facial skin to improve its appearance. It's often used to treat wrinkles, scars, or discolorations. The process involves a specialized tool that gently sands your skin, promoting new, smoother skin growth.

16 services16 patients

Complicated repair of wound of trunk, each additional 5.0 cm or less 13102

This procedure involves the complex repair of a wound located on the body's trunk. It's performed for each additional wound up to 5.0 cm in size. The process includes cleaning, stitching, and dressing the wound to promote healing and prevent infections.

14 services12 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 80220 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

$89.43 typical visit price

range $58.06 – $174.82

Typical copayment $22.35 (range $14.51 – $43.70)

Most-billed visit code 99203

Established Patient

$72.20 typical visit price

range $18.88 – $142.79

Typical copayment $18.05 (range $4.72 – $35.69)

Most-billed visit code 99213

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.

100/100

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

Individually scored

Quality

100

Promoting Interoperability

100

Improvement Activities

Reported Quality Measures

Documentation of Current Medications in the Medical Record

100%4,323 patients5/55-star benchmark: 100%

Melanoma: Continuity of Care - Recall System

100%237 patients

Melanoma: Coordination of Care

100%217 patients

Preventive Care and Screening: Tobacco Use: Screening and Cessation Intervention

Patients combinedPopulations: 100% · 1,731 patients

Patients screened: 100% · 1,731 patients

100%94 patients5/55-star benchmark: 100%

Preventive Care and Screening: Unhealthy Alcohol Use: Screening & Brief Counseling

Patients combinedPopulations: 100% · 917 patients

Patients screened: 100% · 917 patients

100%176 patients

Provide Patients Electronic Access to Their Health Information

94%2,792 patients4/55-star benchmark: 100%

Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

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Other Providers at the Same Location NPPES 13

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

COLORADO CENTER OF MEDICAL EXCELLENCE

Internal Medicine

4700 HALE PKWY, SUITE 300
DENVER, CO 80220

Denver County (720) 320-2061

NEUROSURGICAL ASSOCIATES OF DENVER, P.C.

Specialist

4700 HALE PKWY, SUITE 500
DENVER, CO 80220

Denver County (303) 333-8740

DR. RICHARD ABRAMS M.D.

Internal Medicine

4700 HALE PKWY, SUITE 120
DENVER, CO 80220

Denver County (303) 320-2400

SOMMER WILDER MORENO OT

Occupational Therapist

4700 HALE PKWY
DENVER, CO 80220

Denver County (806) 690-6146

ROSE AMBULATORY SURGERY CENTER LP

Clinic/Center (Ambulatory Surgical)

4700 HALE PKWY, SUITE 200
DENVER, CO 80220

Denver County (303) 758-1175

CORINNE AUFMANN PA-C

Physician Assistant

4700 HALE PKWY, SUITE 550
DENVER, CO 80220

Denver County (303) 321-6600

KEITH A STOETZER PA-C

Physician Assistant

4700 HALE PKWY, SUITE 550
DENVER, CO 80220

Denver County (303) 321-6600

HEATHER PALMER RN

Registered Nurse

4700 HALE PKWY, SUITE #520
DENVER, CO 80220

Denver County (303) 321-6608

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 Karen Sundby's NPI number?

The NPI number for Karen Sundby is 1912977083. It was assigned to this individual provider in the NPPES registry on January 23, 2006. The provider is also known as Dr. Karen Joy Johnson M.D..

Where is Karen Sundby located?

Karen Sundby practices at 4700 Hale Pkwy Suite 140, Denver, CO 80220. The listed phone number is (303) 388-8807.

What is Karen Sundby's specialty?

The primary specialty registered for this NPI is Dermatology, specializing in MOHS-Micrographic Surgery, with taxonomy code 207ND0101X.

Is Karen Sundby enrolled in Medicare?

Yes. Karen Sundby 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 Karen Sundby accept?

Health plans from UnitedHealthcare list Karen Sundby 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.

When was this NPI record last updated?

The NPPES record for Karen Sundby was last updated on May 6, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 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.