Active NPI 1033189634 Individual Practitioner Male Practitioner

Dr. John Frederick Shield , MD

Internal Medicine • Sonora, CA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. John Shield, MD is a certified Internal Medicine practicing in Sonora, CA. With approximately 46 years of clinical experience since completing medical education in 1980, Dr. Shield delivers high-quality medical care to the local community at 690 GUZZI LN.

Dr. Shield maintains professional affiliations with Union Associated Physicians Clinic, Llc, Valley Professionals Community Health Center Inc, Sonora Community Hospital and accepts Medicare assignment.

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, established patient outpatient office visit, test to examine how well the lungs exchange gases. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

690 Guzzi Ln
Suite A

Sonora, CA 953705289

Telephone 2095365070

Associated Practice Facility / Clinic

🏢 Adult Medicine Specialists, Inc Facility NPI 1407842339

Medicare Profile & Education

Medical School

Other

Graduation Year

1980

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in Sonora, CA

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

46 Yrs +18.5 yrs vs City Avg

City Avg: 27.5 Yrs

State Avg: 26.6 Yrs

Regional Practice Density

20 Specialists

Practicing in Sonora, CA (18502 Statewide)

Telehealth Adoption Rate

15.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

55.5% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Shield (46 Years) 46 Yrs

Sonora Specialty Average (27.5 Years) 27.5 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
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	1,220	507	$42.17	$16.36
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	1,036	440	$198.00	$96.12
99213 Established patient office or other outpatient visit, typically 15 minutes	456	288	$134.00	$65.14
94729 Test to examine how well the lungs exchange gases	387	386	$22.00	$8.61
94060 Test to measure expiratory airflow and volume changes before and after medication administration	376	375	$26.00	$9.96
94726 Determination of lung volumes using plethysmography	375	374	$30.00	$11.63
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	78	72	$33.85	$7.99
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	73	62	$292.00	$142.26
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	28	23	$72.00	$34.79
94010 Test to measure expiratory airflow and volume	16	16	$21.00	$7.99
17000 Destruction of skin growth	16	12	$158.00	$56.84

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	1,093	475	$166.15	$98.62
99213 Established patient office or other outpatient visit, typically 15 minutes	497	322	$93.00	$66.69
94060 Test to measure expiratory airflow and volume changes before and after medication administration	277	277	$27.24	$10.28
94729 Test to examine how well the lungs exchange gases	274	274	$23.09	$8.88
94726 Determination of lung volumes using plethysmography	272	272	$31.13	$12.01
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	100	88	$122.00	$8.23
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	57	49	$201.00	$144.88
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	19	16	$74.00	$35.77
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	12	12	$271.00	$134.41

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	1,173	515	$165.99	$100.68
99213 Established patient office or other outpatient visit, typically 15 minutes	510	344	$93.58	$68.35
94060 Test to measure expiratory airflow and volume changes before and after medication administration	359	354	$59.93	$10.55
94729 Test to examine how well the lungs exchange gases	354	350	$35.97	$9.10
94726 Determination of lung volumes using plethysmography	352	348	$48.96	$12.31
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	107	98	$122.97	$8.44
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	53	42	$201.00	$148.99
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	34	25	$74.00	$36.95
17000 Destruction of skin growth	14	12	$105.00	$57.36
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	11	11	$271.00	$138.07

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	1,089	517	$159.13	$102.37
99213 Established patient office or other outpatient visit, typically 15 minutes	705	417	$89.90	$69.20
94729 Test to examine how well the lungs exchange gases	296	295	$34.00	$9.26
94726 Determination of lung volumes using plethysmography	292	292	$47.00	$12.52
94060 Test to measure expiratory airflow and volume changes before and after medication administration	292	292	$57.00	$10.71
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	151	146	$116.77	$8.52
99441 Telephone medical discussion with physician, 5-10 minutes	49	48	$61.00	$36.97
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	46	45	$191.00	$151.37
99442 Telephone medical discussion with physician, 11-20 minutes	40	40	$99.00	$69.55
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	38	38	$258.00	$140.00
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	33	26	$70.00	$37.12
17000 Destruction of skin growth	25	22	$100.00	$56.70
17003 Destruction of precancer skin growth, 2-14 growths	20	11	$68.20	$2.19
94010 Test to measure expiratory airflow and volume	16	15	$34.00	$8.58
99213 Established patient office or other outpatient visit, typically 15 minutes	16	15	$89.00	$69.37
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	12	12	$181.00	$85.75

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	988	501	$150.60	$82.20
99213 Established patient office or other outpatient visit, typically 15 minutes	655	416	$85.69	$53.28
94726 Determination of lung volumes using plethysmography	205	204	$45.00	$12.95
94729 Test to examine how well the lungs exchange gases	202	201	$32.00	$9.58
94060 Test to measure expiratory airflow and volume changes before and after medication administration	194	193	$54.00	$13.70
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	118	109	$110.93	$8.89
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	52	45	$182.00	$116.07
99441 Telephone medical discussion with physician, 5-10 minutes	41	41	$56.17	$26.73
99442 Telephone medical discussion with physician, 11-20 minutes	28	28	$91.57	$53.49
99213 Established patient office or other outpatient visit, typically 15 minutes	28	25	$85.00	$53.69
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	23	23	$246.00	$134.88
17000 Destruction of skin growth	21	14	$95.00	$57.46
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	12	12	$172.00	$78.59
94010 Test to measure expiratory airflow and volume	11	11	$32.00	$8.93

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	976	477	$143.72	$80.84
99213 Established patient office or other outpatient visit, typically 15 minutes	865	455	$81.00	$52.44
94060 Test to measure expiratory airflow and volume changes before and after medication administration	279	277	$51.00	$13.53
94726 Determination of lung volumes using plethysmography	278	276	$43.00	$12.78
94729 Test to examine how well the lungs exchange gases	273	272	$30.00	$9.46
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	148	132	$105.00	$8.75
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	50	50	$243.88	$129.90
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	45	44	$173.00	$113.97
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	18	18	$299.00	$172.24
17000 Destruction of skin growth	18	15	$90.00	$54.85

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	867	444	$78.32	$52.51
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	665	372	$139.08	$80.19
94726 Determination of lung volumes using plethysmography	314	311	$41.00	$12.64
94729 Test to examine how well the lungs exchange gases	312	310	$29.00	$9.36
94060 Test to measure expiratory airflow and volume changes before and after medication administration	292	290	$49.00	$13.40
99213 Established patient office or other outpatient visit, typically 15 minutes	231	201	$79.79	$51.72
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	218	189	$138.00	$79.78
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	125	118	$101.00	$8.58
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	41	41	$101.00	$8.62
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	34	31	$167.00	$112.93
94010 Test to measure expiratory airflow and volume	22	22	$29.00	$8.63
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	19	19	$305.42	$163.10
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	17	17	$240.00	$127.32

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	1,027	462	$133.47	$97.37
99213 Established patient office or other outpatient visit, typically 15 minutes	803	416	$75.33	$62.90
94729 Test to examine how well the lungs exchange gases	248	248	$28.00	$11.51
94726 Determination of lung volumes using plethysmography	242	242	$40.00	$15.56
94060 Test to measure expiratory airflow and volume changes before and after medication administration	241	241	$47.00	$16.47
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	158	149	$97.00	$10.38
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	49	44	$161.00	$140.48
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	27	27	$218.00	$159.22
17000 Destruction of skin growth	21	20	$84.00	$62.92
94010 Test to measure expiratory airflow and volume	21	21	$28.00	$10.41
69210 Removal of impacted ear wax	14	14	$114.50	$41.18

Medical Specialties & State Licenses

CMS Verified: 2024-06-24

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License CA G45205

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.

Hospital & Practice Group Affiliations

Union Associated Physicians Clinic, Llc

1530 N 7th St, Terre Haute, IN 478071057

Phone: 8122341344

Sonora Community Hospital

18661 Hwy 120, Groveland, CA 953219432

Phone: 2099627121

Valley Professionals Community Health Center Inc

1530 N 7th St, Terre Haute, IN 478071061

Phone: 8122387631

Valley Professionals Community Health Center Inc

777 S Main St, Clinton, IN 478422493

Phone: 7658281003

Practice Associates & Co-Workers

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

1 Associated Practitioners

Lisa Andrews , NP

Nurse Practitioner - Primary Care

NPI 1164964086

Nurse Practitioner

Career & Practice History Timeline

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

8 Historical Events

📍

Updated Business Mailing Address May 20, 2024

Registered at 690 GUZZI LN STE A, SONORA, CA 953705292 (Tel: 2095365070)

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) May 20, 2024

Internal Medicine (License #G45205 in CA)

✅

NPI Profile Active October 22, 2013

NPI status registered as active in NPPES database

📍

Updated Practice Location October 22, 2013

Registered at 690 GUZZI LN, SUITE A, SONORA, CA 953705289 (Tel: 2095365070)

📍

Updated Business Mailing Address October 22, 2013

Registered at 16280 STINE CT, SONORA, CA 953708124 (Tel: 2095334918)

👤

Provider Name / Credentials Updated October 22, 2013

Recorded as JOHN SHIELD, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) October 22, 2013

Internal Medicine (License #G45205 in CA)

🟢

Initial NPI Registration & Enumeration January 25, 2006

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: 1033189634

Entity Type:

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

Enumeration Date: January 25, 2006

Last Update: June 24, 2024

Sole Proprietor: No

Update or Correct Profile

Mailing Address

690 Guzzi Ln Ste A

Sonora, CA 953705292

Phone: 2095365070

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

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