Physician Profile
Maruja DEL VALLE Diaz Arjonilla, MD
Unclaimed ProfileAbout Dr. Diaz Arjonilla
Maruja DEL VALLE Diaz Arjonilla, MD is a healthcare provider in Santa Ana, CA specializing in endocrinology. Maruja is also listed as specializing in endocrinology, diabetes & metabolism. According to Medicare claims data, Maruja cared for 238 Medicare patients across 462 services. The services billed most often include established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more, continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report, and subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes. This provider record is associated with NPI 1841481074.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (714) 288-3230
- Email not available
Practice Locations
2212 E 4TH ST STE 304
Santa Ana, CA 92705
1160 Sunset Blvd
Rocklin, CA 85765
Conditions Commonly Evaluated or Treated
Within Endocrinology, Diabetes and Metabolism generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
- Diabetes
- Hyperthyroidism
- Hypothyroidism
- Obesity
- Osteoporosis
- PCOS
- Thyroid problems
Adrenal
- Low sodium or electrolyte imbalance
Adrenal disorders
- Adrenal Fatigue
- Adrenal gland tumor
- Adrenal mass
- Cushing's Syndrome
Blood sugar disorders
- Diabetic neuropathy
- Gestational diabetes
- Low Blood Sugar
- Prediabetes
Bone and calcium disorders
- High calcium
- Low Calcium
- Vitamin D deficiency
Bones
- Soft Bones
Diabetes
- Dangerous high blood sugar
- Diabetic retinopathy
- Kidney disease from diabetes
Endocrine tumors
Hormone disorders
- Early or delayed puberty
- Excess facial or body hair
- Gynecomastia
- Perimenopause
- Testosterone deficiency
Hormones
Metabolic disorders
Metabolism
Parathyroid
Pituitary
- Acromegaly
- Adult Growth Hormone Deficiency
- Underactive Pituitary Gland
Pituitary disorders
- Extreme Thirst and Urination
- High Prolactin
- Pituitary Tumor
- Short stature and growth concerns
Thyroid
- Thyroiditis
Thyroid disorders
- Goiter
- Graves' Disease
- Hashimoto's Disease
- Thyroid cancer
- Thyroid eye disease
- Thyroid nodules
Procedures & services
Most searched procedures
- Hormone replacement therapy
- Insulin pump management
- Thyroid ultrasound
- Weight loss management
Adrenal
- 24-Hour Urine Cortisol Test
- Aldosterone and Renin Blood Test
- Urine Metanephrines Test
Adrenal evaluations
- Adrenal Gland Suppression Test
- Cortisol Testing
Blood sugar management
- Continuous Glucose Monitor Placement
- Diabetes Screening and A1C Test
- Glucose screening test
Bone evaluations
- Bone Density Scan Referral
- Parathyroid Hormone Test
Bone treatments
- Bisphosphonate Infusion for Bones
- Bone Building Injections
Diabetes
- Automated Insulin System Setup
- Blood Ketone Monitoring
- C-Peptide Test
- Continuous Glucose Monitor Data Review
- Medical nutrition therapy
- Starting Insulin Therapy
Diabetes education
- Diabetes Self-Management Education
Diabetes preventive care
- Diabetic Foot Care
Genetic evaluations
- Genetic Testing for Endocrine Tumors
Hormone treatments
- Estrogen and Progesterone Therapy
- Growth Hormone Injections
- Hormone Replacement Therapy Consultation
Hormones
- Gender-affirming care consultation
Metabolic evaluations
- Cholesterol and Lipid Blood Panel
Metabolism
- Fasting Insulin Test
Parathyroid
- Parathyroid Scan
Pituitary
- Growth Hormone Stimulation Test
Pituitary evaluations
- Prolactin Blood Test
- Water Deprivation Test
Thyroid
- Thyroid Cyst Alcohol Ablation
- Thyroid Uptake and Scan
Thyroid procedures
- Radioactive Iodine Treatment
- Thyroid Antibody Testing
- Thyroid Blood Test
- Thyroid Medication Adjustment
- Thyroid Nodule Biopsy
- Thyroid Nodule Radiofrequency Ablation
Weight & Metabolism
- Weight loss medication consult
Procedures Most Often Billed to Medicare
462 services · 238 patients · 8 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Ultrasound scan of head and neck soft tissue | Imaging | 76536 |
32 | Less often than most peers in Endocrinology |
| Continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report | Treatment | 95251 |
64 | As often as other peers in Endocrinology |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
259 | As often as other peers in Endocrinology |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes | Office visit | 99232 |
41 | As often as other peers in Endocrinology |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
21 | Less often than most peers in Endocrinology |
| Blood glucose (sugar) test performed by hand-held instrument | Lab test | 82962 |
21 | Less often than most peers in Endocrinology |
| New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more | Office visit | 99204 |
13 | Less often than most peers in Endocrinology |
| New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more | Office visit | 99205 |
11 | Less often than most peers in Endocrinology |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Related specialists at this location 1
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 24 related providers in 3 groups
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 1990 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Ultrasound scan of head and neck soft tissue 8
Providers in CA who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Diaz Arjonilla?
Dr. Diaz Arjonilla is an endocrinology in Santa Ana, CA. That is the designation recorded for this NPI in the federal registry.
NPI registry
What is Dr. Diaz Arjonilla's address?
Dr. Diaz Arjonilla is listed at 2212 E 4Th St Ste 304, Santa Ana, CA 92705. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Diaz Arjonilla?
The number on file is (714) 288-3230. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Diaz Arjonilla's NPI number?
Dr. Diaz Arjonilla's National Provider Identifier is 1841481074. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Diaz Arjonilla train?
Dr. Diaz Arjonilla attended Other, graduating in 1990. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Diaz Arjonilla been practicing?
Dr. Diaz Arjonilla has 36 years experience. Calculated from a graduation year of 1990, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Diaz Arjonilla perform?
According to Medicare billing data, Dr. Diaz Arjonilla performs imaging including ultrasound scan of head and neck soft tissue; provides treatments such as continuous monitoring of blood sugar level in tissue fluid using sensor under skin with interpretation and report, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Diaz Arjonilla confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Diaz Arjonilla. If this is you, claiming it is free.
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