Active NPI 1952652729 Individual Practitioner Female Practitioner

Anna Elizabeth Willis , PA-C

Physician Assistant • Centennial, CO

Professional Overview & Biography Verified Profile Summary

Anna Willis, PA-C is a registered healthcare professional specializing in Physician Assistant in Centennial, CO. Practice services are available at 9110 E NICHOLS AVE STE 150 under active NPI credentials.

Frequently performed procedures and clinical services include visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's, ultrasound measurement of bladder capacity after voiding, established patient outpatient office visit. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

9110 E Nichols Ave Ste 150

Centennial, CO 801123450

Telephone 7206664739

Associated Practice Facility / Clinic

🏢 Posterity Mens Health Ca, Pc Facility NPI 1023727328

Specialty Benchmarks & Practice Insights

Comparative analytics for Physician Assistant in Centennial, CO

Active Practitioner

Practitioner Clinical Experience

Active

City Avg: 9.9 Yrs

State Avg: 13.1 Yrs

Regional Practice Density

59 Specialists

Practicing in Centennial, CO (3810 Statewide)

Telehealth Adoption Rate

13.6% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

72.6% 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 (2024)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
G2211 Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's	207	193	$48.00	$13.76
51798 Ultrasound measurement of bladder capacity after voiding	152	142	$33.42	$11.60
99213 Established patient office or other outpatient visit, typically 15 minutes	150	133	$280.02	$77.25
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	130	129	$394.95	$109.13
81003 Automated urinalysis test	127	122	$4.00	$2.20
81001 Manual urinalysis test with examination using microscope, automated	118	106	$6.00	$3.11
99442 Telephone medical discussion with physician, 11-20 minutes	38	36	$279.24	$73.53
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	21	21	$555.54	$153.34
99443 Telephone medical discussion with physician, 21-30 minutes	17	16	$394.95	$101.58
51700 Simple bladder irrigation and/or instillation	14	14	$243.45	$65.82
87086 Bacterial colony count, urine	14	14	$20.00	$7.91
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	13	13	$345.03	$94.69

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	184	157	$278.20	$76.98
51798 Ultrasound measurement of bladder capacity after voiding	163	142	$33.42	$11.13
81001 Manual urinalysis test with examination using microscope, automated	141	116	$6.00	$3.11
81003 Automated urinalysis test	123	115	$4.00	$2.20
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	103	99	$392.65	$108.99
99442 Telephone medical discussion with physician, 11-20 minutes	55	49	$248.83	$60.56
99441 Telephone medical discussion with physician, 5-10 minutes	29	27	$159.19	$33.43
87086 Bacterial colony count, urine	29	25	$20.00	$7.91
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	20	20	$555.54	$153.23
51700 Simple bladder irrigation and/or instillation	16	15	$243.45	$66.55
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	15	15	$133.43	$48.75

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	121	103	$116.79	$78.53
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	96	93	$160.42	$111.04
51798 Ultrasound measurement of bladder capacity after voiding	95	88	$13.88	$11.04
81003 Automated urinalysis test	92	90	$3.03	$2.23
81001 Manual urinalysis test with examination using microscope, automated	64	57	$4.00	$3.14
87086 Bacterial colony count, urine	19	18	$10.00	$7.98
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	12	11	$235.33	$155.52
99442 Telephone medical discussion with physician, 11-20 minutes	12	12	$112.00	$77.86
51741 Electronic assessment of bladder emptying	12	12	$17.75	$12.08

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
51798 Ultrasound measurement of bladder capacity after voiding	138	124	$24.23	$10.88
81001 Manual urinalysis test with examination using microscope, automated	137	117	$4.03	$3.15
81003 Automated urinalysis test	129	118	$3.02	$2.25
99213 Established patient office or other outpatient visit, typically 15 minutes	92	83	$163.84	$79.85
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	66	64	$155.97	$113.19
J9217 Leuprolide acetate (for depot suspension), 7.5 mg	60	16	$256.10	$178.16
87086 Bacterial colony count, urine	49	46	$10.24	$7.91
51741 Electronic assessment of bladder emptying	27	27	$25.74	$12.28
96402 Administration of hormonal anti-neoplastic chemotherapy under skin or into muscle	16	14	$40.00	$29.14
51700 Simple bladder irrigation and/or instillation	11	11	$90.00	$70.62

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
51798 Ultrasound measurement of bladder capacity after voiding	33	33	$13.22	$10.74
99213 Established patient office or other outpatient visit, typically 15 minutes	25	23	$76.11	$65.39
81001 Manual urinalysis test with examination using microscope, automated	25	22	$4.00	$3.11
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	22	22	$111.38	$94.87
81003 Automated urinalysis test	20	20	$3.00	$2.20
51741 Electronic assessment of bladder emptying	13	13	$14.95	$12.66

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	149	123	$76.83	$64.22
81001 Manual urinalysis test with examination using microscope, automated	109	90	$4.06	$3.42
51798 Ultrasound measurement of bladder capacity after voiding	106	87	$14.16	$13.05
81003 Automated urinalysis test	100	92	$3.00	$2.44
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	93	85	$112.09	$93.71
J9217 Leuprolide acetate (for depot suspension), 7.5 mg	51	14	$235.92	$227.24
51741 Electronic assessment of bladder emptying	46	43	$15.48	$12.53
11980 Insertion of hormone pellets beneath the skin	19	12	$98.23	$83.13
J3490 Unclassified drugs	17	11	$1271.41	$902.72
96402 Administration of hormonal anti-neoplastic chemotherapy under skin or into muscle	15	14	$31.89	$26.96
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	13	13	$149.31	$126.38

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	177	146	$74.99	$62.74
81003 Automated urinalysis test	105	100	$3.03	$2.68
81001 Manual urinalysis test with examination using microscope, automated	95	85	$4.08	$3.84
J9217 Leuprolide acetate (for depot suspension), 7.5 mg	87	20	$227.00	$217.10
51798 Ultrasound measurement of bladder capacity after voiding	85	77	$17.29	$16.06
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	80	78	$111.68	$90.80
51741 Electronic assessment of bladder emptying	35	33	$16.94	$13.72
96402 Administration of hormonal anti-neoplastic chemotherapy under skin or into muscle	23	20	$32.06	$26.59
J3490 Unclassified drugs	12	12	$1261.75	$1207.66
11980 Insertion of hormone pellets beneath the skin	12	12	$99.00	$82.56

Medical Specialties & State Licenses

CMS Verified: 2026-07-29

Physician Assistant Primary Specialty

NUCC Taxonomy Code: 363A00000X

State License CO 0003482

A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

5 Associated Practitioners

Dr. Kelly Brown , MD, MBA

Urology

NPI 1063839512

Doctor of Medicine (M.D.), Master of Business Administration

Julianna Krisell , PA-C

Physician Assistant

NPI 1154791838

Physician Assistant (Certified)

Dr. Jacob Brems , MD

Urology

NPI 1215381462

Doctor of Medicine (M.D.)

Amy Hitchler , CNP

Psychiatry & Neurology - Addiction Medicine

NPI 1790251114

Certified Nurse Practitioner

Dr. Barrett Cowan , MD

Urology

NPI 1831182203

Doctor of Medicine (M.D.)

Career & Practice History Timeline

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

11 Historical Events

📍

Updated Business Mailing Address July 29, 2026

Registered at 6400 S FIDDLERS GREEN CIR STE 300, GREENWOOD VILLAGE, CO 801114955 (Tel: 8885384185)

📍

Updated Practice Location October 23, 2025

Registered at 9110 E NICHOLS AVE STE 150, CENTENNIAL, CO 801123450 (Tel: 7206664739)

📍

Updated Business Mailing Address October 23, 2025

Registered at 9110 E NICHOLS AVE STE 150, CENTENNIAL, CO 801123450 (Tel: 7206664739)

📍

Updated Practice Location December 15, 2022

Registered at 10450 PARK MEADOWS DR STE 202, LONE TREE, CO 801245528 (Tel: 3037338848)

📍

Updated Business Mailing Address December 15, 2022

Registered at 10450 PARK MEADOWS DR STE 202, LONE TREE, CO 801245528 (Tel: 3037338848)

✅

NPI Profile Active December 07, 2015

NPI status registered as active in NPPES database

📍

Updated Practice Location December 07, 2015

Registered at 799 E HAMPDEN AVE, SUITE 430, ENGLEWOOD, CO 801132700 (Tel: 3037338848)

📍

Updated Business Mailing Address December 07, 2015

Registered at 799 E HAMPDEN AVE, SUITE 430, ENGLEWOOD, CO 801132700 (Tel: 3037338848)

👤

Provider Name / Credentials Updated December 07, 2015

Recorded as ANNA WILLIS, PA-C

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) December 07, 2015

Physician Assistant (License #0003482 in CO)

🟢

Initial NPI Registration & Enumeration September 19, 2012

First registered as active Individual Practitioner in NPPES Database.

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NPI Administrative Meta

NPI Number: 1952652729

Entity Type:

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

Enumeration Date: September 19, 2012

Last Update: July 29, 2026

Sole Proprietor: No

Update or Correct Profile

Mailing Address

6400 S Fiddlers Green Cir Ste 300

Greenwood Village, CO 801114955

Phone: 8885384185

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.