Independent US Healthcare Provider Directory & Public Medical Database Patient Guides

Dr. Maximo Christian Diamond , MD

Internal Medicine • Orange, CA

Active NPI 1063519932 Individual Practitioner Male Practitioner Accepts Medicare assignment
Practice location in NPPES

600 City Parkway West, Suite 400
Orange, CA 928682900

Call 7142215182 Location details and other listings
Medical Disclaimer

This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.

Practice Location & Contact Primary Location

Practice Address

600 City Parkway West
Suite 400

Orange, CA 928682900

Telephone 7142215182
Fax 7142444533
Other Listings in Public Data

CMS Doctors and Clinicians lists 1 group name: Supportive Wound Care Inc. See the list

Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.

Listings do not confirm current availability, employment or a shared ownership network.

Medicare Profile & Education

Source: CMS Doctors and Clinicians National Downloadable File

Medical School

University Of California, Irvine, California College Of Medicine

Graduation Year

1991

30-day fills

865 standardized 30-day fills in 2024

CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.

What this does not show: 30-day fills

It is not a count of patients and not a measure of quality.

Part D drug cost

$50,471 in 2024

The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.

What this does not show: Part D drug cost

A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.

Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024.

Open Payments general payments, program year 2019

All general payments: $31.24 across 2 records.

By nature of payment

  • Food and Beverage: $31.24 across 2 records.

Reporting-company totals

  • Allergan Inc.: $31.24 across 2 records.

A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.

See the full table

Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2019 (published June 30, 2026).

Guide: How to read an Open Payments record

Years since graduation

35 years (graduated 1991)

CMS Doctors and Clinicians data list 1991 as the year this clinician finished professional school.

What this does not show: Years since graduation

It is not the number of years in practice, and more years does not mean better care.

Source: CMS Doctors and Clinicians National Downloadable File.

NPI first issued

2006

The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.

What this does not show: NPI first issued

NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.

Source: CMS NPPES NPI Registry.

Accepts Medicare assignment

CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.

Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.

Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”

Guide: What Medicare assignment means

No telehealth indicator

CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.

Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.

Guide: How Medicare covers telehealth

Enrolled in Medicare (PECOS)

Dr. Diamond has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.

It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What Medicare enrollment (PECOS) means

Can order Medicare-covered services

CMS lists Dr. Diamond as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.

What this does not show: Can order Medicare-covered services

It does not mean the clinician offers these services directly.

Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.

Guide: What ordering and referring status means

Compared with the same specialty in Orange and California

Billing and prescribing volume is not a quality rating.

Medicare Part D prescriptions

Close to the middle for clinicians listed under Internal Medicine in Orange, CA (2024, 109 clinicians with data). Median for this group: 546. Middle half: 101 to 2,251.

Close to the middle for clinicians listed under Internal Medicine in California (2024, 10,795 clinicians with data). Median for this group: 1,254. Middle half: 150 to 4,240.

Part D drug cost

Close to the middle for clinicians listed under Internal Medicine in Orange, CA (2024, 109 clinicians with data). Median for this group: $50,471. Middle half: $3,602 to $217,115.

Close to the middle for clinicians listed under Internal Medicine in California (2024, 10,795 clinicians with data). Median for this group: $88,105. Middle half: $7,557 to $307,080.

187 active clinicians are listed under Internal Medicine with a practice address in Orange, CA (17,717 in California).

Addresses are self-reported to NPPES and may be out of date.

Telehealth indicator in Orange

23.5% of these 187 clinicians have the CMS telehealth indicator.

62% of these 187 clinicians are listed by CMS as accepting Medicare assignment.

Sources: CMS Medicare Part D Prescribers (2024), CMS Open Payments (2019), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.

Text: T-MedInfo · Report an error.

Pharma & Medical Device Financial Disclosures

Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments

Open Payments · Program Year 2019

Program year 2019 (payments made January 1 – December 31, 2019): fewer than 11 records totaling $31.24.

Manufacturer Payment Nature Product Type Amount ($)
Allergan Inc.
Food and Beverage
In-kind items and services
BOTOX COSMETIC General $17.74
Allergan Inc.
Food and Beverage
In-kind items and services
BOTOX COSMETIC General $13.50

Source: CMS Open Payments, program year 2019, released June 30, 2026.

Medicare Part D Prescribing Profile & Medications

Medicare Part D prescriptions filled, including refills, in 2024.

CMS Part D · Data Year 2024
Prescription Year:
Brand Name Generic Name Prescriptions Day Supply Total Cost Patients
Levothyroxine Sodium Levothyroxine Sodium 83 2,611 $663.98 26
Tamsulosin Hcl Tamsulosin Hcl 74 2,220 $857.23 20
Eliquis Apixaban 69 2,075 $35,521.88 24
Metformin Hcl Metformin Hcl 60 1,860 $170.23 23
Losartan Potassium Losartan Potassium 46 1,417 $283.42 16
Amlodipine Besylate Amlodipine Besylate 32 961 $76.73 17
Atorvastatin Calcium Atorvastatin Calcium 32 1,020 $361.49 16
Lactulose Lactulose 32 218 $459.28 —
Lisinopril Lisinopril 31 1,050 $133.46 —
Alendronate Sodium Alendronate Sodium 27 759 $152.18 —
Montelukast Sodium Montelukast Sodium 27 870 $181.05 11
Finasteride Finasteride 26 780 $252.09 11
Metoprolol Succinate Metoprolol Succinate 25 750 $263.73 —
Carvedilol Carvedilol 24 780 $131.12 —
Lantus Solostar Insulin Glargine,hum.Rec.Anlog 22 619 $1,475.92 —
Glipizide Glipizide 22 720 $91.52 —
Amiodarone Hcl Amiodarone Hcl 21 630 $432.65 —
Latanoprost Latanoprost 20 500 $194.49 —
Allopurinol Allopurinol 16 697 $74.73 —
Clopidogrel Clopidogrel Bisulfate 15 450 $49.08 —
Sure Comfort Pen Needle Pen Needle, Diabetic 15 382 $635.23 —
Clonidine Hcl Clonidine Hcl 14 328 $46.50 —
Metolazone Metolazone 13 367 $269.86 —
Levofloxacin Levofloxacin 12 103 $81.78 12
Furosemide Furosemide 12 489 $76.13 —

(top 25 shown)

Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits

Specialties & License Numbers Reported to NPPES

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

License # reported to NPPES CA G74989

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.

Check License Status with the State Board License numbers are self-reported to NPPES; T-MedInfo does not confirm them against state records. Current status: Medical Board of California.
Look Up on State Board Site

Medicare (PECOS) Enrollment & Ordering Eligibility

Source: CMS PECOS
Medicare FFS Enrollment Status Medicare Enrollment on File
CMS Provider Specialty

PRACTITIONER - INTERNAL MEDICINE

Medicare Enrollment ID

I20120612000371

Enrollment State Jurisdiction

CA

PECOS Control ID

4082878699

Medicare Order & Referring Eligibility
Clinical Lab & Imaging (Part B) Eligible
Durable Medical Equipment (DME) Eligible
Home Health Agency (HHA) Eligible
Power Mobility Devices (PMD) Eligible

Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.

Medicare Group Practice Enrollments

Source: CMS Doctors and Clinicians National Downloadable File

Supportive Wound Care Inc

1202 Monte Vista Ave, Upland, CA 917868209

Phone: 8889820847

Career & Practice History

NPI enumerated September 20, 2006.

No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.

No reviews have been published yet. Leave a review.

NPI Administrative Meta

NPI Number: 1063519932
Entity Type:
Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)
Enumeration Date: September 20, 2006
Last Update: March 27, 2015
Sole Proprietor: Yes

Other Internal Medicine Providers in Orange

All Internal Medicine Providers in Orange

More public profiles in California

Directory navigation, in NPI number order.

Mailing Address

Po Box 4140

Monarch Beach, CA 92629

Phone: 7142215182

About This Data NPPES fields (address, phone, specialty, license) are self-reported and may be outdated; Medicare fields follow the CMS dataset named in each section. Correct directly at NPPES.