Dr. Maximo Christian Diamond , MD
Internal Medicine • Orange, CA
600 City Parkway West, Suite 400
Orange, CA 928682900
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
-
Dr. Maximo Diamond is listed in NPPES under Internal Medicine.
-
NPI assigned on September 20, 2006; this date does not establish years in practice.
-
Published CMS data list 826 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
-
Published Part D records, 2024:
- Levothyroxine Sodium — 83 prescription fills, including refills.
- Tamsulosin Hcl — 74 prescription fills, including refills.
- Eliquis (Apixaban) — 69 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 30 records in the table · Guide: How to read Medicare Part D prescriber data
-
Close to the middle for Part D prescriptions among 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 Part D prescriptions among 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.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Billing and prescribing volume is not a quality rating.
-
Medicare Part D prescriptions went from 610 in 2020 to 826 in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2020–2024.
Practice Location & Contact Primary Location
600 City Parkway West
Suite 400
Orange, CA 928682900
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
University Of California, Irvine, California College Of Medicine
1991
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
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.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
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.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2019 (published June 30, 2026).
Years since graduation
35 years (graduated 1991)
CMS Doctors and Clinicians data list 1991 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished 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.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
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?”
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.
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.
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.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
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.
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.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
-
Medicare Part D prescriptions
Medicare Part D prescriptions increased 35% from 610 in 2020 to 826 in 2024.
- 2020: 610
- 2021: 779
- 2022: 201
- 2023: 564
- 2024: 826
-
30-day fills
30-day fills increased 40% from 617 in 2020 to 865 in 2024.
- 2020: 617
- 2021: 783
- 2022: 202
- 2023: 572
- 2024: 865
-
Part D drug cost
Part D drug cost increased 420% from $9,703 in 2020 to $50,471 in 2024.
- 2020: $9,703
- 2021: $33,472
- 2022: $2,673
- 2023: $26,829
- 2024: $50,471
-
Industry payments (Open Payments)
CMS data for industry payments (Open Payments) are available for 2019 only.
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
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.
| 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
NUCC Taxonomy Code: 207R00000X
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.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - INTERNAL MEDICINE
I20120612000371
CA
4082878699
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.
NPI Administrative Meta
Other Internal Medicine Providers in Orange
- Dr. Deepti Pandita, MD
- Dr. Mavis Peng, MD
- Dr. Hassan Jadid, MD
- Dr. Anastasia Haddad, MD
- Dr. Suresh Veeramachaneni, MD
- Dr. Emily Phan, MD
More public profiles in California
Directory navigation, in NPI number order.
- Keith Jones, MD Surgery · Carmichael
- Malalai Nasiri, MD Family Medicine · Pleasanton
- Margaret Kray, RN, FNP Nurse Practitioner - Family · Richmond
- Stephanie Oltmann Family Medicine · Burlingame
- Melissa Gilbert, PA-C Physician Assistant - Medical · San Diego
- Theresa Wilson Nurse Practitioner - Family · San Clemente
- Kathryn Tenney, ND Naturopath · Mill Valley
- Austin Nguyen, DO Emergency Medicine · Fontana
- Ali Bagheri, MD Orthopaedic Surgery - Orthopaedic Surgery of the Spine · La Jolla
- Leah Basch, PA-C Physician Assistant - Surgical · Rancho Mirage
- Mark Lassoff, MD, MBA, MPH Urology · Los Angeles
- Sarah Song, MD Psychiatry & Neurology - Neurology · Los Angeles
Mailing Address
Po Box 4140
Monarch Beach, CA 92629
Phone: 7142215182