Active NPI 1821012188 Individual Practitioner Female Practitioner

Stacy L Walker , ARNP

Nurse Practitioner • Ottumwa, IA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Stacy Walker, ARNP is a certified Nurse Practitioner practicing in Ottumwa, IA. With approximately 25 years of clinical experience since completing medical education in 2001, Stacy Walker delivers high-quality medical care to the local community at 522 N HANCOCK ST.

Stacy Walker maintains professional affiliations with Jefferson County Hospital, Mercy Medical Center-Centerville and accepts Medicare assignment.

Frequently performed procedures and clinical services include emergency department visit with moderate level of medical decision making, emergency department visit for life threatening or functioning severity, insertion of needle into vein for collection of blood sample. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

522 N Hancock St

Ottumwa, IA 525014231

Telephone 6416830800

Fax 6416830801

Associated Practice Facility / Clinic

🏢 Mercy Medical Center-Centerville Facility NPI 1093360679

Medicare Profile & Education

Medical School

Other

Graduation Year

2001

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Nurse Practitioner in Ottumwa, IA

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

25 Yrs +16.2 yrs vs City Avg

City Avg: 8.8 Yrs

State Avg: 11.8 Yrs

Regional Practice Density

21 Specialists

Practicing in Ottumwa, IA (1307 Statewide)

Telehealth Adoption Rate

0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

88.8% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Walker (25 Years) 25 Yrs

Ottumwa Specialty Average (8.8 Years) 8.8 Yrs

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
99284 Emergency department visit with moderate level of medical decision making	12	12	$843.00	$94.08

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99285 Emergency department visit for life threatening or functioning severity	11	11	$1242.00	$139.00

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99284 Emergency department visit with moderate level of medical decision making	23	23	$760.30	$99.20
99285 Emergency department visit for life threatening or functioning severity	14	14	$1131.00	$144.24

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
36415 Insertion of needle into vein for collection of blood sample	158	139	$13.13	$2.91
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	150	145	$186.60	$86.76
80048 Blood test, basic group of blood chemicals (calcium, total)	122	113	$26.57	$8.16
84460 Liver enzyme (sgpt), level	87	85	$17.67	$5.13
84450 Liver enzyme (sgot), level	84	82	$17.67	$5.02
99213 Established patient office or other outpatient visit, typically 15 minutes	75	62	$126.76	$59.12
80061 Blood test, lipids (cholesterol and triglycerides)	65	64	$43.25	$12.92
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg	58	11	$7.41	$1.54
83036 Hemoglobin A1C level	43	43	$31.88	$9.24
84443 Blood test, thyroid stimulating hormone (TSH)	37	35	$53.59	$16.46
81003 Automated urinalysis test	21	20	$11.33	$2.20
99284 Emergency department visit with moderate level of medical decision making	20	20	$705.20	$96.91
99285 Emergency department visit for life threatening or functioning severity	17	17	$1049.47	$140.87
85027 Complete blood cell count (red cells, white blood cell, platelets), automated test	16	14	$20.38	$6.34
20610 Aspiration and/or injection of fluid from large joint	14	11	$173.29	$49.22
85025 Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count	13	13	$31.62	$7.61
82043 Urine microalbumin (protein) level	11	11	$21.45	$5.15

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
36415 Insertion of needle into vein for collection of blood sample	695	387	$5.00	$2.91
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	658	372	$202.00	$85.39
80048 Blood test, basic group of blood chemicals (calcium, total)	533	325	$15.00	$9.11
84460 Liver enzyme (sgpt), level	373	247	$9.00	$5.71
84450 Liver enzyme (sgot), level	372	247	$9.00	$5.56
99213 Established patient office or other outpatient visit, typically 15 minutes	261	182	$137.00	$58.81
80061 Blood test, lipids (cholesterol and triglycerides)	259	229	$23.00	$14.52
83036 Hemoglobin A1C level	196	123	$17.00	$10.30
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg	185	32	$3.00	$1.57
84443 Blood test, thyroid stimulating hormone (TSH)	123	88	$29.00	$18.30
85610 Blood test, clotting time	101	13	$6.00	$4.28
G0008 Administration of influenza virus vaccine	85	83	$50.00	$15.26
85025 Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count	80	67	$13.00	$8.25
90662 Influenza vaccine split virus, preservative free	80	79	$79.10	$53.45
81003 Automated urinalysis test	68	53	$4.00	$2.37
82043 Urine microalbumin (protein) level	54	53	$10.00	$6.17
82570 Creatinine level to test for kidney function or muscle injury	54	53	$9.00	$5.53
96372 Injection beneath the skin or into muscle for therapy, diagnosis, or prevention	54	16	$54.00	$13.20
G0009 Administration of pneumococcal vaccine	50	50	$50.00	$15.44
20610 Aspiration and/or injection of fluid from large joint	33	27	$145.29	$53.76
99284 Emergency department visit with moderate level of medical decision making	30	29	$616.67	$94.65
85027 Complete blood cell count (red cells, white blood cell, platelets), automated test	30	28	$11.00	$7.04
90670 Pneumococcal vaccine for injection into muscle	28	28	$253.00	$208.16
99285 Emergency department visit for life threatening or functioning severity	26	26	$941.73	$139.24
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit	25	25	$371.00	$129.37
90732 Vaccine for pneumococcal polysaccharide for injection beneath the skin or into muscle, patient 2 years or older	25	25	$126.00	$106.44
80053 Blood test, comprehensive group of blood chemicals	25	22	$18.00	$11.05
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	23	23	$251.00	$92.05
71046 X-ray of chest, 2 views	21	20	$40.67	$14.98
83880 Natriuretic peptide (heart and blood vessel protein) level	21	15	$58.00	$38.47
83550 Iron binding capacity	20	18	$13.00	$9.52
83540 Iron level	20	18	$11.00	$7.05
99283 Emergency department visit with low level of medical decision making	17	17	$340.24	$49.85
G0103 Prostate cancer screening; prostate specific antigen test (psa)	16	16	$32.00	$20.03
93000 Routine ekg using at least 12 leads including interpretation and report	16	16	$38.00	$13.33
83735 Magnesium level	14	11	$12.00	$7.29
G0402 Initial preventive physical examination; face-to-face visit, services limited to new beneficiary during the first 12 months of medicare enrollment	13	13	$361.00	$130.76
82607 Cyanocobalamin (vitamin B-12) level	11	11	$26.00	$16.41
99495 Transitional care management services for problem of at least moderate complexity	11	11	$355.00	$130.72

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
36415 Insertion of needle into vein for collection of blood sample	865	418	$5.00	$2.92
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	644	387	$202.00	$85.69
80048 Blood test, basic group of blood chemicals (calcium, total)	547	339	$15.00	$10.16
84460 Liver enzyme (sgpt), level	376	249	$9.00	$6.36
84450 Liver enzyme (sgot), level	370	245	$9.00	$6.21
80061 Blood test, lipids (cholesterol and triglycerides)	334	281	$23.00	$16.06
99213 Established patient office or other outpatient visit, typically 15 minutes	321	214	$137.00	$57.61
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg	261	36	$3.00	$1.77
83036 Hemoglobin A1C level	219	133	$17.00	$11.60
84443 Blood test, thyroid stimulating hormone (TSH)	152	104	$29.00	$20.20
85610 Blood test, clotting time	130	17	$6.00	$4.75
G0008 Administration of influenza virus vaccine	112	111	$50.00	$18.94
90662 Influenza vaccine split virus, preservative free	96	95	$54.69	$52.21
81003 Automated urinalysis test	87	64	$4.00	$2.68
85025 Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count	83	61	$13.00	$9.17
82570 Creatinine level to test for kidney function or muscle injury	59	55	$9.00	$6.07
82043 Urine microalbumin (protein) level	59	55	$10.00	$6.79
G0009 Administration of pneumococcal vaccine	48	48	$50.00	$18.94
85027 Complete blood cell count (red cells, white blood cell, platelets), automated test	47	45	$11.00	$7.82
20610 Aspiration and/or injection of fluid from large joint	43	31	$152.42	$54.05
99211 Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional	39	11	$37.00	$17.05
83540 Iron level	37	31	$11.00	$7.83
83550 Iron binding capacity	37	31	$13.00	$10.57
90670 Pneumococcal vaccine for injection into muscle	32	32	$253.00	$197.57
99284 Emergency department visit with moderate level of medical decision making	27	26	$471.00	$94.48
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit	24	24	$371.00	$136.92
84439 Thyroxine (thyroid chemical), free	21	18	$13.00	$10.91
99285 Emergency department visit for life threatening or functioning severity	21	21	$702.00	$139.23
82607 Cyanocobalamin (vitamin B-12) level	19	19	$26.00	$18.24
80053 Blood test, comprehensive group of blood chemicals	17	15	$18.00	$12.78
90732 Vaccine for pneumococcal polysaccharide for injection beneath the skin or into muscle, patient 2 years or older	17	17	$126.00	$105.59
84550 Uric acid level, blood	16	13	$8.00	$5.47
83735 Magnesium level	16	13	$12.00	$8.10
G0328 Colorectal cancer screening; fecal occult blood test, immunoassay, 1-3 simultaneous	16	16	$27.00	$19.25
99283 Emergency department visit with low level of medical decision making	15	15	$315.00	$49.80
G0103 Prostate cancer screening; prostate specific antigen test (psa)	14	14	$32.00	$22.26
99495 Transitional care management services for problem of at least moderate complexity	13	13	$355.00	$130.73
90682 Influenza vaccine, quadrivalent derived from recombinant dna	12	12	$55.00	$52.30
82306 Vitamin d-3 level	12	12	$51.00	$29.85

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
36415 Insertion of needle into vein for collection of blood sample	748	383	$5.00	$2.92
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	571	334	$202.00	$84.54
80048 Blood test, basic group of blood chemicals (calcium, total)	500	309	$15.00	$8.66
99213 Established patient office or other outpatient visit, typically 15 minutes	391	256	$137.00	$57.67
84460 Liver enzyme (sgpt), level	287	199	$9.00	$3.60
84450 Liver enzyme (sgot), level	285	198	$9.00	$3.58
80061 Blood test, lipids (cholesterol and triglycerides)	270	220	$23.00	$11.17
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg	260	34	$3.00	$1.79
83036 Hemoglobin A1C level	170	102	$17.00	$12.78
G0008 Administration of influenza virus vaccine	120	118	$50.00	$23.08
85610 Blood test, clotting time	111	20	$6.00	$4.68
84443 Blood test, thyroid stimulating hormone (TSH)	103	76	$29.00	$22.37
90662 Influenza vaccine split virus, preservative free	102	102	$54.00	$47.40
81003 Automated urinalysis test	87	59	$4.00	$3.02
85025 Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count	72	59	$13.00	$10.30
85027 Complete blood cell count (red cells, white blood cell, platelets), automated test	56	50	$11.00	$8.69
82570 Creatinine level to test for kidney function or muscle injury	49	47	$9.00	$6.59
G0009 Administration of pneumococcal vaccine	48	48	$50.00	$23.27
20610 Aspiration and/or injection of fluid from large joint	48	32	$147.98	$51.91
82043 Urine microalbumin (protein) level	48	46	$10.00	$7.35
90670 Pneumococcal vaccine for injection into muscle	40	40	$253.00	$184.82
83550 Iron binding capacity	38	30	$13.00	$9.85
83540 Iron level	38	30	$11.00	$8.47
80053 Blood test, comprehensive group of blood chemicals	26	25	$18.00	$12.67
90688 Vaccine for influenza for administration into muscle, 0.5 ml dosage	19	17	$27.00	$16.56
99284 Emergency department visit with moderate level of medical decision making	19	19	$471.00	$94.36
99495 Transitional care management services for problem of at least moderate complexity	14	14	$355.00	$129.29
99202 New patient office or other outpatient visit, typically 20 minutes	14	14	$139.00	$58.94
99283 Emergency department visit with low level of medical decision making	12	12	$315.00	$49.79
99285 Emergency department visit for life threatening or functioning severity	12	12	$702.00	$139.19
G0103 Prostate cancer screening; prostate specific antigen test (psa)	11	11	$32.00	$24.73

Medical Specialties & State Licenses

CMS Verified: 2024-01-22

Nurse Practitioner Primary Specialty

NUCC Taxonomy Code: 363L00000X

State License IA A087201

(1) A registered nurse provider with a graduate degree in nursing prepared for advanced practice involving independent and interdependent decision making and direct accountability for clinical judgment across the health care continuum or in a certified specialty. (2) A registered nurse who has completed additional training beyond basic nursing education and who provides primary health care services in accordance with state nurse practice laws or statutes. Tasks performed by nurse practitioners vary with practice requirements mandated by geographic, political, economic, and social factors. Nurse practitioner specialists include, but are not limited to, family nurse practitioners, gerontological nurse practitioners, pediatric nurse practitioners, obstetric-gynecologic nurse practitioners, and school nurse practitioners.

Nurse Practitioner - Family

NUCC Taxonomy Code: 363LF0000X

State License IA A087201

Definition to come...

Additional State Medicaid & Healthcare Payer Identifiers

Commercial Insurance / Payer ID Wellmarkiowa

07389 (IA)

Commercial Insurance / Payer ID Rivervalleyuhc

42146637605 (IA)

Commercial Insurance / Payer ID Rr Medicare

P00373615 (IA)

Hospital & Practice Group Affiliations

Mercy Medical Center-Centerville

522 N Hancock St, Ottumwa, IA 525014231

Phone: 6416830800

Jefferson County Hospital

2000 S Main St, Fairfield, IA 525569572

Phone: 6414724111

Practice Associates & Co-Workers

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

10 Associated Practitioners

Grace Howe , ARNP

Nurse Practitioner - Family

NPI 1003624909

Advanced Registered Nurse Practitioner

Kimberly Brown , ARNP

Nurse Practitioner - Family

NPI 1013286020

Advanced Registered Nurse Practitioner

Dr. Brian Quinn , DO

Family Medicine

NPI 1023048626

Doctor of Osteopathic Medicine (D.O.)

Dr. Peter Reiter , MD

Internal Medicine

NPI 1659350429

Doctor of Medicine (M.D.)

Theresa Stoker , NP

Nurse Practitioner - Family

NPI 1720740723

Nurse Practitioner

Dr. Robert Blommer , MD

Internal Medicine

NPI 1770569717

Doctor of Medicine (M.D.)

Career & Practice History Timeline

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

13 Historical Events

👤

Provider Name / Credentials Updated November 19, 2021

Recorded as STACY WALKER, ARNP

✅

NPI Profile Active December 27, 2017

NPI status registered as active in NPPES database

📍

Updated Practice Location December 27, 2017

Registered at 522 N HANCOCK ST, OTTUMWA, IA 525014231 (Tel: 6416824594)

📍

Updated Business Mailing Address December 27, 2017

Registered at PO BOX 1475, DES MOINES, IA 503051475 (Tel: 6416824594)

👤

Provider Name / Credentials Updated December 27, 2017

Recorded as STACY GREINER, ARNP

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) December 27, 2017

Nurse Practitioner (License #A087201 in IA)

📍

Updated Practice Location September 19, 2017

Registered at 522 N HANCOCK ST, OTTUMWA, IA 525014231 (Tel: 6416824594)

✅

NPI Profile Active July 17, 2013

NPI status registered as active in NPPES database

📍

Updated Practice Location July 17, 2013

Registered at 1005 PENNSYLVANIA AVE., SUITE 104, OTTUMWA, IA 525016408 (Tel: 6416824594)

📍

Updated Business Mailing Address July 17, 2013

Registered at PO BOX 1475, DES MOINES, IA 503051475 (Tel: 6416824594)

👤

Provider Name / Credentials Updated July 17, 2013

Recorded as STACY GREINER, ARNP

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) July 17, 2013

Nurse Practitioner (License #A087201 in IA)

🟢

Initial NPI Registration & Enumeration July 27, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

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NPI Administrative Meta

NPI Number: 1821012188

Entity Type:

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

Enumeration Date: July 27, 2006

Last Update: January 22, 2024

Sole Proprietor: No

Update or Correct Profile

Mailing Address

Po Box 1475

Des Moines, IA 503051475

Phone: 6416830800

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.