Active NPI 1700835451 Individual Practitioner Male Practitioner

Dr. Gervacio D Diaz , MD

Internal Medicine • Modesto, CA

Professional Overview & Biography Verified Profile Summary

Dr. Gervacio Diaz, MD is a certified Internal Medicine practicing in Modesto, CA. With approximately 38 years of clinical experience since completing medical education in 1988, Dr. Diaz delivers high-quality medical care to the local community at 2013 COFFEE RD.

Dr. Diaz is affiliated with Sutter Valley Medical Foundation and does not directly accept Medicare assignment.

Frequently performed procedures and clinical services include established patient outpatient office visit, annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit, remote monitoring of physiologic parameters, initial supply of devices with daily recordings or programmed alerts transmission, each 30 days. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

2013 Coffee Rd

Modesto, CA 953552405

Telephone 2095298506

Fax 2095298524

Associated Practice Facility / Clinic

🏢 Gervacio D Diaz Iii Md Inc Facility NPI 1437221025

Medicare Profile & Education

Medical School

Other

Graduation Year

1988

Medicare Assignment

Not Specified

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in Modesto, CA

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

38 Yrs +14.4 yrs vs City Avg

City Avg: 23.6 Yrs

State Avg: 26.6 Yrs

Regional Practice Density

131 Specialists

Practicing in Modesto, CA (18502 Statewide)

Telehealth Adoption Rate

24.4% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

19.0% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Diaz (38 Years) 38 Yrs

Modesto Specialty Average (23.6 Years) 23.6 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
99213 Established patient office or other outpatient visit, typically 15 minutes	438	196	$118.00	$87.74
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	147	147	$140.00	$125.43
99454 Remote monitoring of physiologic parameters, initial supply of devices with daily recordings or programmed alerts transmission, each 30 days	110	12	$62.00	$48.05
G0008 Administration of influenza virus vaccine	105	105	$25.17	$24.67
90661 Influenza vaccine, trivalent derived from cell cultures	105	105	$36.85	$36.11
99457 Management using the results of remote vital sign monitoring per calendar month, first 20 minutes	102	14	$52.00	$47.72
G0444 Annual depression screening, 5 to 15 minutes	85	85	$25.00	$18.71
99458 Remote physiologic monitoring treatment management services, health care professional time in a calendar month requiring interactive communication with the patient/caregiver; each additional 20 minute	56	12	$43.00	$37.96
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	28	24	$165.00	$120.14
99348 Residence visit for established patient with low level of medical decision making, per day, if using time, at least 30 minutes	13	12	$97.46	$73.12

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	380	207	$118.00	$87.71
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	156	156	$140.00	$125.31
99457 Management using the results of remote vital sign monitoring per calendar month, first 20 minutes	150	18	$52.00	$47.57
99458 Remote physiologic monitoring treatment management services, health care professional time in a calendar month requiring interactive communication with the patient/caregiver; each additional 20 minute	150	18	$43.00	$38.29
90674 Influenza vaccine, quadrivalent derived from cell cultures, preservative and antibiotic free	113	113	$32.28	$31.63
G0008 Administration of influenza virus vaccine	113	113	$25.17	$24.67
99454 Remote monitoring of physiologic parameters, initial supply of devices with daily recordings or programmed alerts transmission, each 30 days	93	12	$62.00	$50.56
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	26	22	$165.00	$124.03
99496 Transitional care management services for problem of high complexity	22	20	$314.00	$259.15
99348 Residence visit for established patient with low level of medical decision making, per day, if using time, at least 30 minutes	16	13	$97.46	$73.25
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit	16	16	$180.10	$159.54
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	16	16	$220.00	$160.68
93000 Routine ekg using at least 12 leads including interpretation and report	15	15	$75.00	$14.10

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	389	211	$118.00	$88.81
99457 Management using the results of remote vital sign monitoring per calendar month, first 20 minutes	204	25	$52.00	$48.94
99458 Remote physiologic monitoring treatment management services, health care professional time in a calendar month requiring interactive communication with the patient/caregiver; each additional 20 minute	202	25	$43.00	$39.58
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	156	156	$139.89	$128.43
99454 Remote monitoring of physiologic parameters, initial supply of devices with daily recordings or programmed alerts transmission, each 30 days	131	19	$62.00	$55.69
G0008 Administration of influenza virus vaccine	114	114	$25.17	$24.67
90674 Influenza vaccine, quadrivalent derived from cell cultures, preservative and antibiotic free	114	114	$32.28	$31.29
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	34	32	$165.00	$125.08
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit	29	29	$180.10	$163.42
99335 Established patient assisted living visit, typically 25 minutes	16	13	$125.00	$91.35
93000 Routine ekg using at least 12 leads including interpretation and report	15	15	$75.00	$14.05
G0009 Administration of pneumococcal vaccine	14	14	$25.17	$24.72
G0402 Initial preventive physical examination; face-to-face visit, services limited to new beneficiary during the first 12 months of medicare enrollment	13	13	$174.68	$162.90
99495 Transitional care management services for problem of at least moderate complexity	12	12	$222.00	$197.51
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	11	11	$220.00	$163.08

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	480	233	$113.21	$91.74
90674 Influenza vaccine, quadrivalent derived from cell cultures, preservative and antibiotic free	134	134	$29.94	$29.94
G0008 Administration of influenza virus vaccine	133	133	$25.17	$17.82
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	115	115	$122.37	$122.37
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	51	40	$162.12	$129.60
99458 Remote physiologic monitoring treatment management services, health care professional time in a calendar month requiring interactive communication with the patient/caregiver; each additional 20 minute	44	19	$42.95	$40.27
99457 Management using the results of remote vital sign monitoring per calendar month, first 20 minutes	44	19	$51.95	$50.15
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	31	31	$220.00	$169.00
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit	27	27	$180.10	$169.49
99453 Remote monitoring of physiologic parameters, initial set-up and patient education on use of equipment	25	25	$20.28	$19.27
99454 Remote monitoring of physiologic parameters, initial supply of devices with daily recordings or programmed alerts transmission, each 30 days	18	12	$62.00	$62.00
99335 Established patient assisted living visit, typically 25 minutes	17	11	$125.00	$93.59
99496 Transitional care management services for problem of high complexity	13	12	$314.00	$261.33
93000 Routine ekg using at least 12 leads including interpretation and report	12	12	$75.00	$15.04
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	11	11	$145.00	$116.04

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	479	217	$99.00	$78.10
G0008 Administration of influenza virus vaccine	146	146	$25.17	$17.68
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	124	124	$122.37	$120.93
99490 Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month	103	11	$53.04	$43.03
90756 Vaccine for influenza for injection into muscle	95	95	$27.00	$27.00
90662 Influenza vaccine split virus, preservative free	51	51	$57.00	$57.00
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	40	32	$144.00	$111.44
G0009 Administration of pneumococcal vaccine	29	26	$25.17	$17.61
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit	23	23	$180.10	$177.24
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	17	17	$145.00	$112.07
G2012 Brief communication technology-based service, e.g. virtual check-in, by a physician or other qualified health care professional who can report evaluation and management services, provided to an established patient, not originating from a related e/m servic	17	17	$40.00	$13.70
90732 Vaccine for pneumococcal polysaccharide for injection beneath the skin or into muscle, patient 2 years or older	17	17	$113.78	$113.37
93000 Routine ekg using at least 12 leads including interpretation and report	17	16	$75.00	$17.83
99495 Transitional care management services for problem of at least moderate complexity	14	11	$222.00	$194.15
90670 Pneumococcal vaccine for injection into muscle	12	12	$215.17	$213.70
99496 Transitional care management services for problem of high complexity	12	11	$314.00	$252.07

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	615	232	$99.00	$77.03
G0008 Administration of influenza virus vaccine	172	170	$25.17	$17.33
90674 Influenza vaccine, quadrivalent derived from cell cultures, preservative and antibiotic free	157	156	$27.73	$27.16
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	127	127	$122.37	$121.22
99490 Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month	112	12	$53.04	$43.12
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	47	40	$144.00	$113.12
G0009 Administration of pneumococcal vaccine	35	35	$25.17	$17.33
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit	34	34	$180.10	$178.23
99335 Established patient assisted living visit, typically 25 minutes	25	16	$125.00	$97.99
90670 Pneumococcal vaccine for injection into muscle	24	24	$193.00	$189.14
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	23	23	$145.00	$112.23
99496 Transitional care management services for problem of high complexity	22	20	$314.00	$241.21
93000 Routine ekg using at least 12 leads including interpretation and report	18	18	$75.00	$17.78
90756 Vaccine for influenza for injection into muscle	15	15	$27.00	$26.13
90732 Vaccine for pneumococcal polysaccharide for injection beneath the skin or into muscle, patient 2 years or older	11	11	$98.85	$96.87

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	667	229	$99.00	$72.44
G0008 Administration of influenza virus vaccine	150	150	$25.17	$21.47
90756 Vaccine for influenza for injection into muscle	144	144	$22.80	$22.33
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	90	90	$122.37	$115.83
99490 Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month	85	13	$53.04	$42.13
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	65	55	$144.00	$107.97
G0009 Administration of pneumococcal vaccine	50	50	$25.17	$21.47
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	35	35	$145.00	$106.33
90670 Pneumococcal vaccine for injection into muscle	32	32	$193.00	$189.13
99496 Transitional care management services for problem of high complexity	23	20	$314.00	$232.16
99335 Established patient assisted living visit, typically 25 minutes	22	12	$125.00	$94.08
93000 Routine ekg using at least 12 leads including interpretation and report	21	18	$75.00	$17.07
90732 Vaccine for pneumococcal polysaccharide for injection beneath the skin or into muscle, patient 2 years or older	20	20	$98.85	$96.87
G0180 Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and	16	12	$80.00	$54.07
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit	16	16	$180.10	$160.97
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	11	11	$220.00	$163.31

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	619	226	$99.00	$73.41
90656 Vaccine for influenza for administration into muscle, 0.5 ml dosage	149	149	$19.25	$18.86
G0008 Administration of influenza virus vaccine	147	147	$25.17	$24.67
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	112	112	$122.12	$119.67
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	78	59	$144.00	$109.91
G0009 Administration of pneumococcal vaccine	44	44	$25.17	$24.67
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit	27	27	$179.62	$176.03
93000 Routine ekg using at least 12 leads including interpretation and report	26	25	$75.00	$17.67
90670 Pneumococcal vaccine for injection into muscle	25	25	$189.64	$185.60
99495 Transitional care management services for problem of at least moderate complexity	24	21	$222.00	$169.42
90732 Vaccine for pneumococcal polysaccharide for injection beneath the skin or into muscle, patient 2 years or older	19	19	$94.43	$92.54
G0506 Comprehensive assessment of and care planning for patients requiring chronic care management services (list separately in addition to primary monthly care management service)	18	18	$66.20	$65.19
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	18	18	$145.00	$111.64
99490 Chronic care management services, first 20 minutes of clinical staff time directed by health care professional, per calendar month	17	12	$53.04	$43.49

Medical Specialties & State Licenses

CMS Verified: 2023-03-13

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License CA A69801

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

Sutter Valley Medical Foundation

1011 Sylvan Ave, Modesto, CA 953501693

Phone: 2095504780

Sutter Valley Medical Foundation

600 Coffee Rd, Modesto, CA 953554201

Phone: 2095241211

Career & Practice History Timeline

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

6 Historical Events

✅

NPI Profile Active September 08, 2008

NPI status registered as active in NPPES database

📍

Updated Practice Location September 08, 2008

Registered at 2013 COFFEE RD, MODESTO, CA 953552405 (Tel: 2095298506)

📍

Updated Business Mailing Address September 08, 2008

Registered at 2013 COFFEE RD, MODESTO, CA 953552405 (Tel: 2095298506)

👤

Provider Name / Credentials Updated September 08, 2008

Recorded as GERVACIO DIAZ, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) September 08, 2008

Internal Medicine (License #A69801 in CA)

🟢

Initial NPI Registration & Enumeration May 09, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

0 Reviews

No patient reviews submitted yet for Dr. Gervacio Diaz. Be the first to share your experience!

Only verified registered users can submit ratings, post feedback, and upload facility photos.

NPI Administrative Meta

NPI Number: 1700835451

Entity Type:

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

Enumeration Date: May 09, 2006

Last Update: March 13, 2023

Sole Proprietor: Yes

Update or Correct Profile

Mailing Address

2013 Coffee Rd

Modesto, CA 953552405

Phone: 2095298506

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.